Well, that's kind of right.^^
I won't try spoiling, only using information from the first episode
So they live in a world where people have powers, they're called quirks. You're born with them, but a small percent of people don't get one. I think it's 80% people do get quirks, and the other 20% don't. The main character, dude with green hair, Izuku Midoriya, doesn't have a quirk.
And in their world, well if you have powers, theres going to be people who use it for bad. But there's also poeple who will stand up to these "villians" and fight them off. Being a hero is like an occupation. And of course all the little kids dream of being a hero, including Izuku.
But how will someone without a power, a quirk, become a hero?
It may seem like he's a sidekick to a hero, but it's actually that the person he's with all the time (blonde hair - named all might) is a hero he looks up to!! He meets him in the first episode, and fanboys over him lol. Izuku asks him if someone like him could become a hero, and his reply is no. But because of the events of the episode, all might acknowledged him, and told him that if he tried, he could become a hero. And he helps him train for the first couple of episodes, so Izuku can get into a very popular school, called U.A, where kids can become heroes! It's the school All Might went to, so all the kids want to follow All Mights lead and go to U.A!
I hope you won't consider this a spoiler, I've only briefly covered main parts of the first episode.
