The Young Lady from the Riverside (1959)

Helena Pokorná, a young worker, and her widowed father are employed in the same factory. The father is spending his holidays at home in Prague and is looking forward to work. Helena is to go to the seaside for a rewarding holiday. On a hot July day, the girl rides to work in a crowded tram. On the embankment, the crowd pushes her out and Helena fails to get into several other cars. Tempted by the river, the girl calls in sick to work. She takes a steamer to Prague district Modrany. There she meets a young man who wants to sleep by the river after his night shift. Helena is drawn into the strange pastimes by a group of notorious loafers and water girls. One of the hooligans hides her clothes. Helena is helped by a young man who keeps following her after she wakes up. Her father, who was taking Helena's snacks to work, finds out that his daughter is considered sick. He hops in behind her at the machine and looks forward to dealing with his unwell daughter. Meanwhile, the girl walks around Prague with her new acquaintance and dreads returning home. She runs away from the young man, but he arrives at their apartment before she does. She is delighted to learn from Pokorny's father that Helena is a proper girl. Helena is ashamed of her actions and tears up the recreation voucher herself. (official text of the film's distributor)