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Veterinarian Mun-ho is on the way to visit his parents with his fiancée Seon-yeong, when Seon-yeong suddenly disappears at a rest stop while he is gone for a few minutes. Mun-ho looks all over the rest stop for her, but it seems as though she has simply evaporated, leaving only a hairpin on the restroom floor behind. Back in Seoul, Mun-ho goes to Seon-yeong’s house to find a mess that smacks of a break-in: He is convinced that his fiancée has been kidnapped. However, while searching for her, he discovers that Seon-yeong is not her real name. Receiving no further help from the police, he seeks help from his cousin, former detective Jong-geun. As they dig dipper into her disappearance, doubts increase and they get closer to uncovering another shocking truth about Seon-yeong.