Tomek is a young man who is living in an apartment with his friend’s mom after his friend leaves. He watches a neighbor, Magnalena, using a small telescope each night and even knows her routine as she readies herself for bed. He figures out who she is and calls her, but does not talk, knowing that will upset her. He enjoys watching get upset with him. But he also gets upset with her when he sees her making love to a boyfriend. He plays a prank. He calls the gas company to come out and fix a leak just as she and her man are having sex so that they are interrupted. Tomek enjoys it when the interruption causes her to cool off and her boyfriend to get mad.
Tomek becomes a milkman so that he can deliver milk to her. She wakes up early and so this job makes his schedule more like hers. On a ruse (he took her empty bottle away and told her she forgot to put it out) he gets her to open her door to him and he sees her in her nightgown. Magnalena has a fight with her boyfriend and in her despair she spills her milk and then cries over her situation. Tomek watches the whole scene and develops feelings for Magna. It just happens that the lady he lives with speaks to