公寓 (2004)

One beautiful autumn morning, a man wakes up next to his wife. After taking out the garbage, he shaves and apparently prepares to go on a voyage, The two are having breakfast, without a word. The radio hums cheerful morning songs. A routine ritual. The man then leaves. He takes the elevator, waves at his wife after exiting the building, but he makes a turn, enters the building from the back entrance, takes the elevator and stops a few floors up from his apartment. His mistress opens him. The next morning, the ritual is almost the same....