A romantic comedy features a public prosecutor who goes undercover to infiltrate a crime family in Haeundae, Busan, then gets into an accident and loses his memory. He then becomes embroiled in a love affair with the daughter of an organized crime ring boss. After he recovers his memory, he stands at a crossroads and has to decide whether he denies his love and has his lover jailed, or he leaves his job and lives with her as a member of a crime ring.