Climate change has depopulated northern Europe.
In Jokkmokk, one of the few inhabited enclaves, Stockholm detective Selma Fredriksson is tasked with solving a murder. The Sami policeman Aslak Järvi supports her, unaware that Selma is pursuing completely different goals.
In the barren tundra of Sarek, the two track down a criminal who wants to control people’s actions using nanotechnology. They don’t know that Selma has long been infected with the nanobots until she turns her weapon on Aslak in the deserted expanse.