There is a small frontier post. A soldier abiding by the rules of the system gradually turns into a murderer.

An autumn day in the 1970s. In the mountains by the southern border of Bulgaria, a military bus rattles along a bumpy road. On board the bus are new soldiers. The bus finally reaches a border post situated in a former monastery. This post lives according to its own laws, quite close to those of the outside world. At least apparently...—Guy Bellinger