The plot is based on the story of a treasure hidden at the bottom of the Siemianowka Reservoir. It is sought by both "local" residents and foreign tourists. The action takes place in the middle of summer at a camping site, where local beauties work, assisted by shady businessmen. The idyllic summer atmosphere is shattered by the mysterious death of a local fisherman.... Two detectives appear on the scene, local clown Michal Ordon and the star of the capital's police station Konrad Lambert, who like Flip and Flap begin their investigation. In addition to the criminal mystery, this film will not miss a lot of good humor and love, and the very finale of the film will be unexpected and very surprising....