Twins Adamek and Evicka are so alike, it is impossible to tell them apart, which enables the malicious Eva to get away with all sorts of naughty tricks and leave the blame to fall on Adam. The pair grows up and Adam decides to pay Eva back for the tricks she played on him in the past. When he discovers that the handsome Dr Prokop Novotny is interested in Eva, he dresses up as Eva and startles the suitor. His game is finally up and the twin's angry father, in order that there is no more confusion, decides to cut Adam's hair short like a boy's. Of course, he cuts Eva's hair by mistake. (official distributor synopsis)