Ok this is more detailed and complex show. So a short summary does not really do the job.
The Vought Company has created superhero's , but has told the public, that they were natural powers,
just human evolution.
They then run a group of them and make tons of money off them, they market them like a product.
And they boss the supes as they are called, and tell them what to do , and what not to do.
There is a group/ team of 7 supes with homelander being the oldest, the most powerful, and the leader.
he has the powers of Superman.
Then there is basically
the Flash
Aquaman
Super ninja
Invisible man also invulnerable
Wonder Woman
Starlight is the newest, but less powerful than the others.
they have other names, like the flash guy different costume, and name, but essentially the flash.
Homelander starts to decide he no longer needs the company or the woman exec who raised him,
and starts to think he should run everything including the planet.
1 guy is out to get homelander for killing his wife, and another guy his GF is killed by the flash accidentally
lol he runs into her at top speed while high on a drug splatt!
So those 2 get together along with 2 more, and form a team to take down the supes, which is seemingly
impossible for 4 normal guys.
Starlight is the only supe that isnt corrupted , and she wants to be a real hero, so is appalled by the other supes.