They are River Maidens. They sneak toward the stream in the pre-dawn hours as mist strokes the dark waters and chills run through their skin. They present gifts to the river rapids and leave with the night... When you pay for a fishing permit in a quiet Scandinavian town, you cannot even think that you will fish out someone’s corpse from the river stream. But here - Suomenlinna, Royal Gate, murder. The victim has not yet been identified and there are no witnesses. Before the eyes of the modern community, the pagan legend of the King of Water and the River Maidens comes to life. But all this is just the beginning. When Saana begins to investigate the case of a girl who drowned 30 years ago, she does not yet know that a new victim has been found in the sea fortress with a burned-out crown mark. But why did the corpse remain in plain sight? And how is it related to its plot? It is published in Russian for the first time.