The story takes place in two kingdoms—Tatranský and Vltavský. The royal parents of the former have a son of marriageable age, while the latter have a daughter at an age when princesses are most interested in choosing a noble groom, preferably at a lavish ball. However, Princess Liduška is interested in only one thing in the whole world—her beloved carrier pigeons. She devotes all her time to them, and the only man she communicates with, of course via pigeon post, is an unknown fellow breeder. But Prince Vranko is also not interested in getting married and ascending the throne... And to top it all off, the clever maneuvers that Liduška and Vranko use to thwart their parents' wedding plans are complicated by a magical duo—the wizard Čaro and the witch Boska.