In prosperous Sweden, in the gloomy depths of Stockholm, strange shadowy people hide. Among them are a teenage girl and a crazed man named Leo. In the basement under St. George’s Hospital, police find a mutilated corpse of a woman with multiple stab wounds. This is Liz Pedersen, whose daughter Jannika disappeared several years earlier. They say the mother didn’t even look for her. But before that, she accused her former husband of corrupting the girl.
Commissioner Evert Grens, determined to find the murderer and try to save the daughter of the dead woman, decides to conduct a dragnet in the basement.