A tram pasted with posters travels through Prague. The mounted loudspeakers invite passers-by to a series of concerts of Giuseppe Verdi's masterpieces. On the tram, a party of young people is getting drunk. They all either work or study, but they hang out together at parties and restaurants. Irena fancies the photographer Pavelka but he prefers the waitress Alena. Petr alias Sunny [Sluníčko] lives in a trailer at the bank of Vltava and is practising for an original theatre performance of his own. He has shaved his head and when he gets drunk, his friends paint a picture of the Sun on it. Their relationships are very liberal and so when Irena gets pregnant she and Pavelka discuss whether she should raise her child as a single mother. Pavelka denies that he is the father of her child. When the party visit the cabaret at the U Fleků tavern, they all laugh at the decadent humour. Irena is the only one who doesn't laugh. She grows sad when she hears a joke about a knocked up car and a "knocked up" daughter. A television crew wants to do a feature on Petr but he is unsure about it and finally kicks them out. Alena has lost her job as a waitress and works as a cleaning woman. In a fierce argument, she admits to Pavelka that she went to bed with somebody else too...
Petr zvaný Sluníčko
Dva modré balonky, My cizinou jsme bloudili, Vem košilku mezi zuby, Schody do nebe
sbor (My cizinou jsme bloudili), sbor (Vem košilku mezi zuby), Jan Bartoš (Schody do nebe)