Katia Petrovska, an employee of the police public relations office, ends up having a strange vacation. Together with her husband Vadim Kravchenko and their friend Sergey Meshchersky, she came to a Baltic resort, and on the very first day they witnessed a savage and mysterious murder. The case didn’t end there—after a few days they found a dead teenage girl. As Katia discovered, such “incidents” with young women are nothing new here. But the killer—like a ghost—leaves no clues. And then there are local legends about the Waterman who takes revenge on people; his wet tracks are regularly found on the floor of the church. Right away, three people—Katia, Meshchersky, and local resident Marta—managed to identify the murderer. Only Meshchersky, at the moment of insight, was out fishing at sea, while Katia and Marta found themselves face to face with a maniac…