Fable, an assassin employed by organized crime, has achieved legendary status as a ruthless killer capable of murdering any man within six seconds. Six years after his debut, his boss fears that Fable has attracted too much attention from legal authorities and orders him to hide in Osaka for a year. Accompanied by his driver, who assumes the identity of his sister, Fable is bound by a special condition: he must act as a civilian and not murder anyone, lest he and his partner lose their lives. However, the seemingly well-deserved holiday soon takes a grim turn. Takeshi Ebihara, the second-in-command of the Osaka mafia that officially protects the assassin, sees Fable's presence as a threat and wants to remove him. Constantly monitored by the yakuza and regularly put in life-or-death situations, Fable has no other choice but to outwit Takeshi's schemes if he wants to stay alive.