In prosperous Sweden, strange shadow people are hiding in the dark belly of Stockholm. Among them is a teenage girl and a crazy guy named Leo. In a dungeon under St. George's Hospital, police find the mutilated corpse of a woman with multiple stab wounds. This is Liz Pedersen, whose daughter Yannicka disappeared several years ago. They say her mother never looked for her. But before that, she accused her ex-husband of corrupting the girl. Commissioner Evert Grens, in order to find the killer and try to save the daughter of the dead woman, decides to organize a raid in the dungeon.