A man stands outside an apartment building, lighting a cigarette. He goes inside. As he rings the bell at the 4th floor, a woman answers and lets him in. The alarm rings. The man and woman wake up. He takes out the garbage. She makes breakfast. After breakfast, he packs his suitcase and leaves. He goes outside. He lights a cigarette. After that, he goes inside. He rings the bell at the 8th floor. A woman answers and lets him in. A week later. The alarm rings. The man and woman wake up. He takes out the garbage. She prepares him breakfast. He goes back inside and rings the bell at the 4th floor...