Luck-Key

Jae-sung, a struggling actor, is at the end of his rope. With no money, no job, and no hope, he prepares to take his own life. But fate intervenes when he accidentally causes a notorious hitman, Hyung-wook, to lose his memory after a soap-slippery fall in a public sauna. Seizing the opportunity, Jae-sung switches locker keys with Hyung-wook and takes on his luxurious life, complete with a fancy apartment and a fat bank account. Meanwhile, Hyung-wook, clueless about his true identity, assumes the life of Jae-sung, struggling to make ends meet and working as a lowly extra on a TV show. Despite his lack of acting chops, Hyung-wook's natural talent for knife skills lands him a job as a chef at a small restaurant, where he impresses the boss's daughter, Lina, with his culinary prowess. As Jae-sung enjoys the high life, he discovers a secret room in Hyung-wook's apartment, thinking it belongs to an undercover cop protecting a witness named Eun-joo. Jae-sung takes it upon himself to watch over Eun-joo, falling in love with her in the process. But things take a turn when Hyung-wook regains his memory and realizes that Jae-sung has been impersonating him all along. With Hyung-wook's return, Jae-sung must confront the consequences of his actions and decide whether to return to his old life or embrace his newfound love and identity. Will these two men be able to switch back to their old lives, or will their newfound personas stick? Themes: Identity, class, romance, comedy, action.

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Some movies that have similar genres and were produced around the same time as Luck-Key include Red Notice, The Nice Guys, Now You See Me 2, Kingsman: The Secret Service, Concrete Blondes, The Green Hornet.