Through the darknes of Nyx (Marvel FF)

Imagine you wake up in a unknown building, without memories about yourself or your life. People you don't know tell you that you're a mutant. They say that they want to help you, but they won't let you out of the building? Will someone come to free you and the other mutants? Then what will happen to you?

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I still work on the description.
It is a marvel fanfiction, but it isn't exactly in the mcu. Mutants exist and the avengers, but not the x-men. I got the idea through "new mutants" and I really like the prompt that the avengers all live in the headquarters (the one in the end of "age of ultron") but it isn't exactly in that timeline. Bucky, Loki, Scott Lang, Hope and Pietro are part of the avengers in my au. Hope you can enjoy it, even though it isn't accurate for the movies.
The Mc is gender neutral, so everyone can read it.
English isn't my first language.
Sorry for grammatical errors, pls correct me.