A burned-out professional sniper finds himself trapped in an all-glass penthouse by a lethal competitor and must find a way to survive and escape with little to no cover between him and the killer.

Athens, 1943. An apartment is requisitioned to provide accommodation for a German officer. In the apartment live the Helianos, a middle-aged couple who used to be well-off. He is an intellectual, moderate and patient. She is an anxious housewife. They have a ten-year old son who is filled with melodramatic revenge fantasies and a twelve-year old daughter. With the arrival of Captain Kalter everything is wiped out. The methodical, ascetic, cruel Kalter is a military god who inflicts terror. And the Helianos give in, submissive. They are now servants, with no identity other than their acquiescence...