Mysterious murders occur on the outskirts of a Siberian town. Torn bodies are found in alleys and landfills. The authorities are organizing a massive catch of stray dogs and shooting of wolves...

There are bad rumors about a local historian. Everyone who enters his house disappears without a trace. The old man does not heat the stove, lies in an empty, cold room, in which there is no furniture except a couch and a white skin on the floor...

The owners take the sick and old dog Tarzan away from the house and throw it in the forest. But the dog must return and save his Little Mistress. He knows that next to her, among the blue snowdrifts, Something is growing that threatens all living things.

This Something is also felt by a student renting a room in a wooden house nearby. A student who can turn into a dog on moonlit nights...