Detective Sergeant Eigil Holst is on holiday in the countryside when the body of a baby is washed up on the banks of a nearby lake. The local magistrate orders the lake to be drained and the body of a young woman is discovered, naked and weighed down with stones tied to her feet and neck. Her identity is a mystery. Holst takes it upon himself to find out where this woman came from, why she was in this remote location and who could have had motive...