More than twenty years after the Second World War, a mining engineer named Fischer is revealed as a former member of the Gestapo, Karel Kraus. He is sentenced for murder to eight years in prison and now works with other prisoners on the renovation of the Convent of St Agnes of Bohemia in Prague. Then a car with a foreign registration begins to park regularly close to the construction site. Its crew, a man and a woman, contact the construction foreman, who probably would not reject a bribe offer to perform some service. The prisoner Bicík is appointed to work with Kraus; Bicík gives him a message from Kraus' brother Bert, who lives abroad, that he wants to help him escape.

Set in a vagabond and petty bourgeois environment, the three stories deal with the pitfalls of love, the petty and insidious betrayals of trust.

Zofie and Dominika, two girls of very different temperaments, become friends during hop-picking volunteer work in the summer. Zofie (Jaroslava Schallerová) is serious to the point of reticence and she is delighted with her friendship with Dominika. For the self-assured and superficial Dominika (Irena Svárová) the whole thing is just a momentary whim. When she leaves the work camp before everybody else, she doesn't even say goodbye to Zofie. The two girls meet again after the holidays as first-year students at medical school, and become close again during the nursing techniques class.