Tereza (Eva Trejtnarová), a high-spirited and ambitious country girl is discontented with her subservient position as a maid and quits her job with the haughty countess. She meets the dragoon lieutenant Egon (Pavel Trávnícek) at a garden party. He is stationed in Klatovy, where Tereza has an aunt. At a fair the two young people meet again. Egon gets into a duel with a drunken colleague because of Tereza. Tereza attends to the wounded Egon's injuries and the two become lovers. The girl stays with her aunt and helps the aunt do laundry for the officers. She secretly continues meeting Egon and naively believes he will marry her. She sobers up from her romantic passion after the lieutenant arranges to get transferred to another place.