The story of four friends who accidentally found a treasure. From a seasoned fisherman, they learned about the secret of the treasure of Stepan Razin himself, who at one time atamanized on the shores of the Great Mother Volga, in the Samara Bow of the Zhiguli Mountains. It was there that he buried his untold treasure, performing a "funeral rite", sacrificing a young Persian princess. During a boat trip, friends get into a terrible storm, after which they find themselves on a desert island.