Jae-young is a high school student who is often bullied by the school’s mob leader, Yong-gyu. When Yong-gyu is hospitalized, Hoon wants to take his place at the top of…

Mantis, an ace assassin, returns to the contract killer industry after a hiatus, encountering his trainee friend Jae-yi and a retired legendary killer Dok-go, who now runs the organization.