A shy Warsaw university student is in love with a girl who pays no attention to him. Change comes after her intimate love letters are read publicly at a party.

Andrzej Kozakas Andrzej "Penguin"
Krystyna Konarskaas Baśka Oraczewska
Zbigniew Cybulskias Łukasz
Janina Szydłowskaas Irena, Pingwin's Mother
Elżbieta Święcickaas Bączkowa, Adaś's Mother
Mieczysław Mileckias Jan, Pingwin's Father
Andrzej Szczepkowskias Architect Paweł Bączek, Adaś's Father
Wojciech Duryaszas Adaś Bączek
Irena Karelas Party Attendant
Emilia Krakowskaas Girl in the Phone Booth