So, it starts out with a guy dropped from a vertibird, fighting a super mutant as he falls, with a fat-man and a tesla cannon. He hits his head when he falls so he has amnesia. As he explores new york he has to fight a pack of intelligent super mutants(based at statue of liberty which they call the statue of steel) who have joined the brotherhood of steel, so they have power armor. its all just a big misunderstanding tho, the mutants are just fighting to save a faction of intelligent fire ants(who live in the empire state building) that are dying cuz the only water they have to drink is irradiated. So the guy has to find his past as well as a geck to help the mutants and the ants. Plus he lives in a vault with a pet deathclaw.