Luck-Key (2016)

"Adapted from the Japanese movie "Key of Life", it tells a comedy story about a cold killer with a 100% success rate and an unknown actor, who exchange identities for the key to a public bathhouse wardrobe. The ruthless killer Hyung Wook, played by Yoo Hae Jin, slipped and lost his memory in the bathhouse, while the unknown actor, played by Lee Joon..."