A group of union members, impressed by the First World Festival of Democratic Youth, held in Prague in 1947, decide to found a dance troupe. However, they are looking for someone who can teach them everything they need...
A musical comedy about two indistinguishably similar siblings who love music, but each of them is completely different. Pavel Fořt is a professor of classical music at a pedagogical institute, his brother is a jazz musician and plays music in America. When the twin brother suddenly appears in Prague, they switch roles.
