Hyung Wook, a perfect assassin, slips at a sauna and passes out. Jae Sung, a struggling actor, witnesses the accident and switches locker keys with him. Inside, Jae Sung finds a key to a luxury car and condo, gaining access to the assassin's wealth and secrets. Meanwhile, Hyung Wook wakes up with amnesia and, tracing payment bills, discovers he's a broke actor. With the help of a paramedic, he learns Jae Sung's
