Based on the novel of the same name by Anatoly Shkarin.

1993. Due to a natural disaster, a novice writer from Kharkiv becomes a hostage of a small fishing village, shackled by the clamps of icy horror. Horrific murders are taking place in the vicinity, which superstitious villagers attribute to a terrifying swamp monster. But will the young man be able to unravel the tangle of mysterious circumstances when he seems to be opposed by the devil himself? After all, his uncle, the "mad professor," left him not only a house but also a terrible secret connected with an abandoned deep well.