The quiet, calm life of a small coastal town of the plot "Siren Season 4" ends with the appearance of a beautiful stranger. None of the locals know where this girl of perfect beauty came from. Like a fabulous nymph, she glided along the street, and all passers-by admired the charming, slender figure of the young lady, her light, as if flying gait. However, with the advent of a stranger, strange things begin to happen, after which many people die or simply disappear without a trace. One way or another, but all traces lead to water, it is with this element that troubles are associated. None of the centenarians remembers that something like this happened before, associated with so many deaths in a short period of time. The police calls for reinforcements from the capital to find the villain who managed to kill so many victims, breaking many destinies, destroying hopes and aspirations for a wonderful quiet life in a magnificent piece of paradise.
Only an old healer, versed in spells, herbs, capable of healing, knows about the nature of the appearance of these misfortunes. The woman is trying to convey to the residents information about the strange appearance of a siren that appeared from the depths of the sea according to an ancient legend, but no one believes the woman's stories, believing that the old woman has lost her mind. Poor people refused to believe that there were sea sirens, which, with their unearthly beauty, gentle melodious voices, ruined brave sailors. At first, these beauties lured victims with songs, then, when men, feeling the touch of marvelous beauties, lost their vigilance, monsters of magical beauty brutally killed the unfortunate, and completely empty ships crashed on rocks or washed ashore. Biologists, police, fishermen, volunteers, all tried to find a maniac, depriving the lives of the townspeople. But the answer was so close.