After the assassination of prime minister Olof Palme in 1986, Stig Engström managed to elude justice right up to his death through a combination of audacity, luck, and a perplexed police force.
When the police officer Veronika Gren (Alexandra Rapaport), struggling with a tablet addiction, sees a dead boy (Sam Herrgard), she questions her sanity, but she realizes that she is facing victims of unsolved crimes and that her past can help to catch a killer on the loose.
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.
Sanna is the 21-year-old daughter of a rich landowner in southern Sweden. Her father, Bengt, makes his fortune by leasing his vast expanse of inherited land to hardworking family farmers, many of whom struggle to make ends meet. Stern and unyielding, Bengt holds influence over those less fortunate, while Sanna struggles with the idea of becoming his heir apparent. When she begins a relationship with Marcus, the penniless son of a nearby farmer, her father issues an ultimatum — leave Marcus or lose her inheritance.
Erik returns to the northernmost of Sweden after a lifetime with Stockholm police save The Hunters (1996) and False Trail (2011). Retirement doesn't become him so he helps his nephew Peter, a rookie at the local police.
When Katarina Huss starts as a police officer, she must learn to cope with the hard everyday life on the streets of Gothenburg. At the same time, her colleagues seem to be hiding something and soon she is drawn into a tangle of corruption and betrayal.