Sonia’s family decides to move to the most ominous place—the Graf’s Manor. They are not frightened by the statues that move in the park, by legends about mermaids in the Quiet Lake, nor by the ringing bell from a flooded church. They believe the rumors of the villagers can’t be trusted. But if mermaids are only a fabrication, why, in the night silence, do strange sounds carry through? Why do traces of wet hands remain on the windows? Why is the door handle always wet, as if someone is trying to come in? And why does the ghost of Sonia’s dead sister insistently warn of the danger to come? Despite their parents’ skepticism, Sonia is sure: the mermaids of the Quiet Lake are not a myth. Ten years ago she encountered one of them, and it almost ended in tragedy. Now she has to meet them again…