Invited by an old friend to a dinner, a man is greeted by a maid in a luxurious and deserted apartment. She leds the only guest into a room, the door of which is then locked close behind him. From a window lit in front, the foggy face of a young woman staring at the void. On a small table, in the prison room, a desert rose. Nothing else will happen, but a few footsteps and a woman's voice asking him to listen, on the other side of the door.