Luck-Key

Leokki is a movie starring Hae-Jin Yoo, Joon Lee, and Yun-hie Jo. A hapless loser assumes the identity of an amnesia victim without knowing that he is an assassin.
A reverse comedy that tells the story of a perfectionist assassin who falls and hits his head in a sauna, giving him amnesia. When a down-and-out actor switches locker keys with him, they switch lives until the hit-man, who soon becomes an action hero on TV, starts to remember things.