 The film won the David di Donatello (an annual Italian motion picture award) for Best Film.All the actors, a mix of Spaniards and Italians, spoke Spanish in the dubbed version released in Spain, and in Italian in the dubbed Italian version.This drama documentary film describes the attack - known as Operación Ogro - made by four Basque separatist members of ETA, on 20 December 1973 against Luis Carrero Blanco known also as the "Ogro" (ogre).