This is a world where superpowers coexist with ordinary people. Homelander (Antony Starr), Locomotive (Jessie Usher), Deep Sea Lord (Chace Crawford), Queen Maeve (Dominique McElligott), Transparent (Alex Hassell) and Black (Nathan Mitchell) belong to the world's largest superhero company Water Group. While helping the government punish evil and maintain world peace, they also help the company earn countless profits as idols. Huey (Jack Quaid) is an ordinary boy whose girlfriend died in an accident, and the maker of this accident was the locomotive. Huey was unwilling to accept Water's sloppy apology and compensation and decided to avenge his girlfriend.