A Stockholm detective must team up with his estranged ex-cop father to catch a serial killer targeting police officers, forcing them to resolve their differences during the investigation.

The polarization of Swedish society has reached unprecedented levels and prison-like walls are separating privileged citizens from vulnerable and supposedly dangerous zones, governed by special laws. When the Home Secretary is abducted by masked men at a rally in one of the largest 'no-go' zones, Paradis City, special agents Fredrika enlists Emir, an ex-MMA fighter facing life in prison to find the politician, otherwise he might risk losing a chance to see his daughter again.