When the crown jewel of the collection – “The Beach in Pourville” by Claude Monet – disappears from the National Museum in Poznań and Julka’s aunt is falsely accused of the theft, Julka and her friend Olek must find the painting and reveal the identity of the true thief. The perfect duo starts investigating, but Felka, a crazy 12-year-old, appears there too, followed by troubles.
