"Black Sun" is a film about mental suffering. The train journey metaphor for that period of mental distress. Giulio locked inside their compartment no longer able to perceive the world outside him. He sees projected as a film on the walls of his skull stages of his former life. A journey illuminated by the black sun, you do not know when it starts, how and when it will end. A black sun because the days have lost their color. Black seems to have entered into you upsetting life.