Bruno Volta is a true "virtuoso" of solving riddles, and he can see right through people. One day his skill at combining and making money comes into full swing. His young girlfriend Agnieszka, under unusual circumstances, meets a girl named Wiki. The new acquaintance finds a mysterious and valuable object in the wall of an old house — the crown of Casimir the Great. Volta can not miss the opportunity to get a million. Together with security guard Dycha, he decides to play vabanque. But it will not be easy because innocent-looking Wiki is actually a worthy opponent.