The man sitting in his cell was reflecting on the recent events that led to him going to Azkaban, the Wizard Prison. He was betrayed by those he considered friends and family.
The Weasleys, Granger, everyone had betrayed him. But this young man was accustomed to hardships. You see, this young man was not normal, even by magical standards. He was the only person to survive the Killing Curse cast by the most feared Dark Lord in history.
Harry Potter survived with only a lightning bolt scar on his forehead while Lord Voldemort was expelled from his body, to live as a spirit.
Five years ago, at the end of his Fifth year, he was framed for murder of innocent muggles in London, and had a farce of a trial. His trial only lasted for two days before he was thrown into Azkaban.
All throughout the trial, the Weasleys and Granger kept shooting Harry hate filled glares. Ron and Hermione personally testified against Harry, telling the Wizengamot how mentally unstable he was and how they suspected all along he was dark.
But this was the past and did not matter in the present situation. Harry contemplated what he should do when he escaped. Yes, he was going to escape. Harry was an animagus, and can turn into a snake, a King Cobra to be exact, and able to slither through the bars on his cell door.
He was tempted to go on a killing rampage on those that betrayed him, but quickly discarded that idea because that was predictable.
After giving some thought to the matter, he decided to let the Wizarding World fend for themselves. He decided to join the muggle military, more specifically the British SAS.
Before he was thrown in Azkaban, he was training like mad to get in shape to battle Voldemort. He grew several inches taller so he no longer looked scrawny, and instead adopted a lean and wiry body type. His hair was shoulder length and sufficiently hid his scar.
'Today is the day I get out, on the anniversary of the day I was thrown into Azkaban' thought Harry has he prepared himself to change into the Cobra.
Meanwhile, Albus Dumbledore rushed to get to Azkaban. He recently received an owl from Voldemort himself gloating how they turned on Harry and that Harry hated them all and how he orchestrated the whole thing.
'Oh Merlin, what have we done to that poor boy' thought Dumbledore.
When Dumbledore arrived at Harry's cell, he was shocked to find it empty. A lone tear slid down his cheek as he whispered, "I'm so sorry my boy. I failed you."
Far away from Azkaban, a dark haired youth stepped into the Recruitment station.