Lee Hyeon-Myeong

A former serial killer with Alzheimer's fights to protect his daughter from her mysterious boyfriend who may be a serial killer too.

Hell-bent on avenging the murder of his family, a former detective infiltrates a remote island that serves as a prison for vicious death row criminals.

Betrayed and on the run, a former North Korean agent tries to seek revenge on the man who killed his wife, find his missing daughter, and uncover the secrets hidden inside the eyeglasses of a dead man.

In the near future of South Korea, where it became lawless due to an economic crisis, a new authoritarian government implements the “Permanent Exile Law” to easily control the country. According to this law, death row inmates are permanently exiled to a detention center, the Purgatory, built in abandoned nuclear power plants. With a degree of self-governance granted by the government, the Purgatory gradually reaches a point where it is beyond external control, leaving the government struggling to find a solution. Yu-seong, a police officer who became a death row inmate due to the revenge for his daughter and wife, is offered a deal by the Director of NIS. Now Yu-seong must eliminate the Purgatory Boss, the king of the center, in exchange for possible pardon.

A detective suspects that his wife murdered a gangster's brother. As he tries to misdirect the police and the bloodthirsty gangster while independently investigating his wife, terrible secrets slowly begin to surface.