A factory manager in rural Czechoslovakia makes a deal with the army to send soldiers to the region to improve the morale of his young, female workers who have been deprived of male companionship since the local young men were conscripted. The army sends reserve soldiers, mostly middle-aged, married men. Andula, a local beauty, rejects these men's advances and instead falls for a jazz pianist who has recently arrived from Prague to perform. He seduces her by telling her she's not like other women, who are round like guitars, but rather like a guitar painted by Picasso. After spending the night with him, Andula receives a lecture on her honor from the hostel so she chooses to leave behind her other suitors and sets off to Prague to find the pianist. However, his protective mother and weary father are not pleased when she shows up at their doorstep with her suitcase.