Slečna od vody is a 1959 Czechoslovak film directed by Bořivoj Zeman and written by him and Jiří Karásek.
Her father will be spending the summer holidays at home in Prague and is already looking forward to returning to work.
But one sweltering July day, the sight of the cool river leads her to call in sick at work.
She takes a ferry to Modřany, a suburb of Prague, where she meets a young man who pulls her into the world of strange fun, notorious drifters, and women of the water.
Helena is so embarrassed by her cavorting that day, she tears up her vacation coupon from work.