Mun-ho and Seon-yeong are a couple engaged to be married who pull over at a rest stop on their way to meeting Mun-ho's parents. When Mun-ho returns to the car with coffee, he finds the car door flung open in the pouring rain with the engine still running - his fiancée is nowhere to be found. Frantic after discovering her apartment emptied out and that her previous workplaces don't even exist, Mun-ho enlists his cousin and former police detective, Jong-geun, to help him find her. As they delve deeper, they discover that piecing together the shards of this woman's puzzle produces a horrifying picture.