Scientists begin to conduct a secret experiment, the purpose of which is to study the interaction of man and tree in the course of their interfusion — through the fusion of human and tree molecules. The conceived experiment is far-fetched, but the result, which scientists expect to get, is very tempting — the man-tree will be stable with respect to the aggressive environment, durable, very unpretentious ...
A small group of scientists is sent to a remote forest range, who want to be both researchers and experimental participants. However, the forest is not deserted, as scientists thought. Firstly, there lives a forester with his family (wife and son) and a dog. Secondly, strange creatures wander through the forest, left here after a previous phantasmagorical experiment.