On the Istra reservoir in the Moscow region, near elite mansions and upscale hotels, an unknown creature kills young girls.
Suspicion falls on the businessman and former biologist Dmitry Savichev, who is spending a vacation with his family at a five-star hotel.
To prove his innocence, the young man decides to uncover the mystery of the water-dwelling monster that locals call the unclean spirit of the water—the "little pharaoh"…