The film presents interesting archaeological research, recalling the legend of the city of Wineta, a port and an important trade center, which is to be located on the Wolin Island at the mouth of the Odra River. The 11th-century German chronicler Adam from Bremen mentioned it first. This wealthy city was to be looted and destroyed by the Danes in the mid-11th century. With time, a legend was written that Wineta was swallowed up by the sea, which was a punishment for the faults of its inhabitants.