Eddie (Strand Scarsgaard Stellan Skarsg å rd) is an experienced detective who has been immersed in all kinds of cruel and terrible murders for many years, and Eddie's personality begins to become cold and numb. A series of vicious cases caused panic in the city, and the murderer's abominable methods and ferocious personality were unheard of by Eddie, who launched an investigation with the help of her partner Helen (Melissa George Melissa George). As the investigation deepens, a notorious gang that has been lurking in the city for many years has surfaced, and Eddie seems to have an inexplicable relationship with a man named Daniel (Ashley Waters Ashley Walters). Helen found that the murderer hidden in the dark seemed to be trying to give some clues by leaving strange symbols on the body, and Eddie's unbearable past was hidden in these clues.