Disclaimer: I don't own Harry Potter or the Marauders.

A few things about this story:

1. This story is an AU

2. Remus never went to Hogwarts, but he is a Wizard. It will be explained how later on in the story.

3. James, Sirius, and Peter are still the Marauders and still became Animagi, just not for Remus. They did it for the challenge.

4. There will be no OCs because I hate those. They have turned me off for many stories that I would have read if there were no OCs.

5. Peter is not a traitor in this story as of right now. He might be one later.

6. Silver does affect werewolves in this story.

7. Just because I like Tonks, she will also be in this story and closer to the Marauders age. She is going to be sixteen and will appear in later chapters.

The Underground

Chapter 1

For the past seven years, James Potter, Sirius Black, Peter Pettigrew, and Lily Evans have been attending Hogwarts School of Witchcraft and Wizardry. Hogwarts is a boarding school where young witches and wizards go to learn magic. They start school there when they turn eleven.

James Potter is a spoiled Pure-Blood who was sorted into Gryffindor. He lived in Godric Hollow with his parents until halfway through his seventh year when they died of Dragon Pox. In his fifth year, he successfully became an Animagus, a stag. He was Head Boy in his seventh year at Hogwarts. For the past seven years he has been pulling pranks, hanging with his friends, torturing the Slytherins, breaking rules and laws, and falling in love. He was in love with Lily Evans.

Lily Evans is a muggle-born witch who was sorted into Gryffindor. She lived in Mill Town with her parents and older sister, Petunia, who disproves of magic and thought it was freakish. Her first friend from the magic world was Severus Snape, a Slytherin in her year, who lived near her. In her seventh year at Hogwarts she became Head Girl and began to fall in love with James Potter, who she thought was an arrogant jerk for the past six years because he always broke rules and was rude to everyone else.

Peter Pettigrew is a Pure-Blood who was sorted into Gryffindor. Before Hogwarts he lost his father to a dark wizard. His mother has never been the same since the attack. In his fifth year, he became an Animagus with Sirius and James. He is a rat.

Sirius Black is a Pure-Blood who was sorted into Gryffindor. He comes from a family of dark wizards and witches who believe in what Voldemort is doing. He didn't believe in anything his family believes, making him the white sheep in the family. In his fifth year at Hogwarts, he successfully became an Animagus, a dog. He also came up with the idea of making The Marauders Map that year. It took the Marauders the rest of the school year to complete the map. They had to use James's invisibility cloak that he inherited from his dad to be able to get it done before their fifth year ended.

These four students were standing in front of their Headmaster, Professor Dumbledore, and their Head of House, Professor McGonagall, during the last week of their seventh year at Hogwarts. They were called to his office to discuss something important.

"So, Professor, why have you called us here?" Sirius asked. He has long black hair and bright grey eyes that were filled with life.

James looked up from gazing at Lily when he heard Sirius ask the question on all their minds. He has short black hair and hazel eyes that were hidden behind his glasses. He looked at his Headmaster curiously.

Lily looked away from James to look at the Headmaster as well. She has long beautiful wavy red hair and emerald green eyes.

Peter Pettigrew, who has short mousy brown hair and grey eyes, looked away from the window to see his Headmaster smiling.

"In the past years, you four have been very vocal in your dislike of Voldemort,"- unlike most people, the four seventh years did not flinch at the name- "and his followers. You believe what he is doing is wrong and are not afraid to voice your opinions against him. He is becoming more dangerous with trying to purify the Wizarding World." Dumbledore began.

The four seventh years shared annoyed and angry looks. They hated Voldemort with a great passion.

"I have formed an organization to fight against Voldemort. I would like you four to join this organization." Dumbledore said.

The students' eyes shined with determination. They wanted to help end Voldemort. If joining this organization was the way to help end his terrorizing, than they would join. It was time to stop Voldemort from hurting all these families.

"I accept." James said.

"So do I." Peter said.

"Me as well." Sirius said.

Lily nodded her head. Being a Muggle-born, she was one of Voldemort's targets. She would join to protect the other Muggle-borns and help end Voldemort. "I will join as well. Is Professor McGonagall a part of this organization?" She looked at her Transfiguration teacher then back to the Headmaster.

"Yes, she is." Dumbledore replied. He slid a piece of paper on the desk towards the students. "Look at that address, but do not speak it allowed. This is the address of where the organization's headquarters will be."

"Is it under some sort of protection?" Lily asked as she read the address.

The Headquarters of the Order of the Phoenix may be found at Number 16 Kings Grave.

McGonagall nodded her head. "It is under the Fidelius Charm."

"The first meeting is the twenty-second of June at ten in the morning. You can meet the other members than." Dumbledore said.

"This is great. We're going to fight!" Sirius said excitedly when they left the Headmaster's office.

"We're going to take that bastard down." James added with a grin.

Lily frowned and hit James's arm. "Don't swear."

"Yes ma'am." James replied immediately.

Peter snickered. "Whipped."

Sirius snickered behind his hand.

James glared at them. "Shut it."

A week later Lily, Sirius, and Peter apparated to James's house that he inherited from his parents when they died. Together they apparated to Kings Grave and walked down the road until they reached number fifteen and number seventeen. They thought of the address that Professor Dumbledore showed them and the house appeared between the two houses.

"Good morning Ms. Evans, Mr. Potter, Mr. Pettigrew, Mr. Black." Dumbledore greeted.

"Good morning sir." James replied as he looked around the house. A living room was to their left, but Dumbledore led them down the hallway and past the staircase to a doorway in the back. In the back room was a table with twenty-five chairs around the chair. One of the chairs was at the head of the table where Professor Dumbledore went and sat down at.

"The first order of business for today is I would like to introduce the four new members of the Order of Phoenix. Lily Evans, James Potter, Sirius Black, and Peter Pettigrew." Dumbledore motioned to each student as he said their names. Each new member was tossed a small black leather square that looked like a wallet.

Sirius's flipped his open to see a picture of him along with a with a golden phoenix pin.

"It proves that you are a member of the Order of the Phoenix. It also allows you access to restricted material at the Ministry and anyway else that the public is not allowed to go." Dumbledore explained to them.

Alice grinned at them. "It's good to see you guys again."

"Alice!" Lily smiled brightly at her.

"Before we go any farther, it is time for introduction for the new members." Dumbledore said. He pointed to the person to his left and went from there. "Alastor Moody, Aberforth Dumbledore, Alice Longbottom, Frank Longbottom, Benjy Fenwick, Caradoc Dearborn, Dedalus Diggle, Dorcas Meadowes, Edgar Bones, Elphias Doge, Emmeline Vance, Fabian and Gideon Prewett, Marlene McKinnon, Minerva McGonagall, Mundungus Fletcher, Hagrid, and Sturgis Podmore."

The four new members nodded to each person as they were introduced. After all the introductions were made, the four teens sat at four of the empty seats and turned their attention to Dumbledore.

"Recently, I have gotten information about Voldemort," –a few people flinched here, while the others rolled their eyes at them- "wanting to recruit some more help in taking over the wizarding world."

"What kind of help?" Gideon asked.

Dumbledore frowned. "Dark creatures. He is looking for the Underground."

Lily blinked and looked confused. "The Underground? What is that?"

"The Underground is a group of werewolves that live underground. They are led by Fenrir Greyback. I guess that most of the people who live in the Underground were bitten by Greyback." Dumbledore explained.

"Sorry, but I never heard of Greyback." Lily said even more confused.

"Greyback is a werewolf who bites the kids of parents who offend him." Dumbledore said.

Lily frowned. "That's horrible."

Dumbledore nodded his head. "Most of them join him in the Underground because that is the only place they can go to. No one accepts werewolves into their lives. Muggles have even gotten bitten and their families have pushed them away, resulting in them running to the Underground to live."

Lily shook her head. "People can be so cruel."

"What do we do then, Albus? If Voldemort," –a few people flinched- "is looking to recruit werewolves than what should we do?" Moody asked.

"Greyback will most likely agree with Voldemort and everyone in the Underground will follow him because that is all they have to live for. We must take Greyback out." Dumbledore said.

"And all the others that live in the Underground?" James asked.

Dumbledore smiled. "It is most likely the Underground will disband when they no longer have a leader, so we won't have to worry about the whole Underground Society joining Voldemort." Some people shuddered at the name.

"So first we have to find it." Fabian said.

"I already have an idea of where it is. I just need a team to go there." Dumbledore said. He looked over the group. "Moody will lead the team that will enter the Underground. On his team will be Gideon, Fabian, Frank, James, and Sirius. Alice, Benjy, Caradoc, Edgar, and Elphias will be on the team that will guard the entrance to the Underground as backup. They will be led by Minerva."

James and Sirius perked up. They didn't think they would get chosen for such an important mission for their first mission.

Moody looked at them. "Are you sure it is wise to have two new recruits on this mission?"

"I'm sure they can handle it." Dumbledore replied.

In another part of London, a young teenager who looked about eighteen was walking out of a dark open passage in an alley. When he passed the open passage, the doorway closed itself by two wooden boards coming out of the walls and shutting it followed by bricks beginning to build a wall in front of the wooden boards.

The teenager has light brown hair and gold eyes. His golden eyes shined with pain, but also amusement and had a faint twinkle in them. He was dressed in muggle clothes which were blue jeans that had holes in them where his knees were, a black T-shirt with the picture of a wolf on it, a dark blue jacket, and a pair of black fingerless gloves. He had a feeling something interesting was going to happen today. The first interesting day since he was six.

When he was six, his father insulted a werewolf by the name of Fenrir Greyback. Greyback took revenge on his father by biting him. His father regretted this so much that he promised that he would let his son learn magic even if no school would accept him. He even kept the fact that his son was a werewolf a secret.

At eleven, he got a wand and his father and mother homeschooled him for five years. He wanted to learn so much that he spent the next five years learning everything, not even bothering to take a summer break. He learned everything that students at Hogwarts take seven years to learn and more.

When he was fifteen, werewolves came to his town and his father and mother were killed in the fight against them. They came there looking for him on orders from Greyback. After killing his mother and father, they took him back to the Underground Society. He has lived in the Underground for the past three years. He hated having to be so near Greyback. The only good thing was that he was the only wizard there.

The teenager sighed and continued down the sidewalk. Anyone in the society could come and go as they pleased, including himself who was there against his will. He was given this freedom to so he would stop trying to leave the Underground. He would leave it often and go stay in the Leaky Cauldron. He used the money his parents left him to stay there and he worked at a bookstore for money to put in his vault so he wouldn't run out of money.

He wasn't sure what it was, but he was sure that something was going to happen soon and he was glad for it. It has been so boring lately that he was glad for whatever was going to happen soon.

A/N: Please Review!