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. Back in Seoul, Mun-ho goes to Seon-yeong’s house to find a mess that indicates 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 deeper into her disappearance, doubts increase and they get closer to uncovering another shocking truth about Seon-yeong.