Martial artist Cha Moo-yeol falls for President Chang's manipulations and becomes a vegetable while competing in mixed martial arts. He is then used by the chairman as part of Jang's makeover. When he finally dies, he is possessed by the body of a high school student of the same name.A hard body with S-class durability. A status bar ability that allows him to improve his martial arts skills, but this time it's different.With his unfulfilled dream of becoming the strongest, he begins the fight for revenge against the president.