Poor Setsuna...

Interesting take on how Setsuna had her Talisman removed, although if you go with the anime timeline for her, Pluto was never killed and reborn. She is the original senshi from the Silver Millenium. Other than that, saw a couple of typical early writing flaws that I'm not going to complain about since you can probably go back and spot them yourself.
Beyond that, there's a couple of places where some additional elaboration would have been nice. For example how she knew to attach the Talisman to her mother's key. What instinct made Setsuna do that? Also, did she feel anything when her mother first gave her the key?

So anyway, feel free to ignore anything in my comments.

Later,

Shavaineth

I like it. It is a little different, because most stories of Sailor Pluto start in the Silver Millenium, because by now on Earth pluto would already be a sailor. One thing you might want to work on is putting it more in character for Setsuna. In the manga, she is a lonely distant character, and even though this is when she is young, she might already start to develop this. Otherwise, great job!

Cool! Anything about Sailor Pluto is awesome. I love to think of little Setsuna as a child. Good job!

That was a good story and you don't usually find ones the revole around Pluto's past that are is a great one.