Katso koko elokuvan verkossa ilmaiseksi suomenkielisellä tekstityksellä. In Siberia Sergey Zimov and his son Nikita are attempting to slow down the melting of the permafrost, which holds huge carbon reserves, by reintroducing large mammals present in the area during the ice age. It is a mammoth project driven by the faith and convictions of a small group of adventurer-researchers.