Murder investigator Evert Bäckström is convinced that crimes have been committed when a women's cranium is found on an island in the archipelago. But his investigation is countered by the police chief and when the woman's identity is clarified, the entire investigation is turned upside down.

A group of social media experts are hired to help an old family business to strive. But they soon find themselves stuck on a tiny island in a lake in which an ancient Swedish witch is said to live.

The police is under heavy media pressure after fatally shooting a 14-year-old boy. A demonstration against the violence gets out of hand and the police have to take further blame.