Tensions in Spain are rising: political violence and social unrest have suddenly re-emerged. Madrid is trying to keep a tight leash on Catalonia, where the call for independence is getting louder by the day. The last time Barcelona moved to break away, in the 1930s, Spain quickly descended into civil war.

Down in Valencia, a shallow grave is found among abandoned orange groves just outside the city. Chief Inspector Max Cámara, now heading up the new Special Crime Unit, is put on the case. But this is no ordinary murder. Behind it, Max uncovers a tangled web that could awaken ghosts from the past, decimate Barcelona and destabilise the whole country