Sam sits in his nice flat, preparing to shoot up. He cooks the heroin and injects himself. He sits on his sofa in peace. A series of people ring the bell: drug users, his brother, the landlord, friends. Each time, Sam looks through the peephole. A Christmas wreath is on the door across the way. Sometimes Sam lets the people in, sometimes he ignores them. It's not always clear if they are real or imagined. He hosts a party. He's about to shoot up in the next room when the doorbell rings again. Who's calling now?