Saitama is a passionate hero who never craves money or fame. He has now become so strong that he beats his enemies with just one punch. He serves the Hero Association with his trusted fellow Genos.
Things start challenging when monsters of the Monster Association kidnap the child of the Hero Association’s leader. All S-class heroes gather to plan an attack on monsters to save the hostages. Meanwhile, Garou, a human monster, is also captured by monsters, who regain consciousness in their hideout.
