The monster in me

One day, you wake up in a building on a deserted island, with no memory of what happened... You're locked in a room, the interior design looks like the eighties, you wonder what you're doing here, but you don't remember anything, as if someone erased your memories with an eraser...
Something strange is happening there. You see and hear things that you shouldn't notice with the naked eye as a living person.
What's going on?
You feel like you're going crazy. You have friends with you who, like you, don't remember anything.
Paranormal phenomena are easy until a murderer appears among you, who wants revenge for the past, with which you think you have nothing to do...