The heroes of Class S, with the support of their comrades in the Association, continue to fight monsters. They rescued Caprice from captivity, but it turned out that another child had disappeared underground. While the rescuers were deciding who would return for the boy, Saitama wandered around the lair in search of the source of the noise and, unknowingly, crushed the Lord of All Monsters — the King of the Snake! And in the depths of the dungeon, meanwhile, Garo regained consciousness, who announced a hunt for heroes...The book includes chapters 119-131, as well as bonus ones.