It is 1953, Stalin has just died. It is a troubled and uncertain period for the whole of the Soviet Union, particularly for the state security services. In the Institute, a secret research facility, the scientists continue their theoretical and experimental work. Every night they strain their ears to listen for footsteps in the dark corridors: who have they come for this time? Who has reported on who? Having survived the fear and humiliation of an interrogation, the Head of the Theoretical Depar...