Tensions in Spain are rising: political violence and social unrest have re-emerged. In Catalonia, the call for independence is getting louder. The last time Barcelona moved to break away, in the 1930s, Spain descended into civil war. A shallow grave is found among abandoned orange groves outside Valencia. Chief Inspector Max Cámara, heading up the new Special Crime Unit, is on the case—but he uncovers a tangled web that could decimate Barcelona and destabilize the whole country. The stakes are higher than anything he’s ever known.