Nuit blanche
The film starts when Kim Si-hoo, a pawnbroker, is found dead in a remote town in a derelict building, the police are divided whether it was a murder or a suicide.
Fourteen years previous to that a man's body is found on an abandoned ship. The prime suspect, a woman suspected of being his lover, is also found dead soon afterwards. The woman's daughter Lee Ji-ah later changes her name to Yoo Mi-ho when she moves in with her aunt, where she grows a flower garden.
Fourteen years later, detective Jo Min-woo accidentally discovers the link between the two cases. Talking to the pawnbroker's widow and her son, Kim Yo-han, gives no clue. Then Jo Min-woo requests assistance from Han Dong-soo, who was investigating this case fourteen years ago. Han Dong-soo remembers every fact as this unsolved case ruined his career and killed his son. Dong-soo decides to re-investigate along with Min-woo and Lee Si-yeong, an employee of Mi-ho's rich fiance.
Yo-han has matured into a murderer and eliminates those who get in Mi-ho's way. He exists as Mi-ho's shadow, requiring nothing in return. Secretly they are still as close as ever while they are living out separate lives. Mi-ho knows of Yo-han's crimes but looks away from them and encourages them. It is later revealed that Yo-han killed his father after he found him molesting Ji-ah, and Ji-ah killed her mother who was pimping her out to throw suspicion off Yo-han. In the end, Yo-han kills himself to protect Ji-ah.
magical realism