A Siberian tigress named Katia and her one-year-old cub move through the snow forests of Russia's Far East, hunting, sparring with bears and wolves, and staying just out of reach of the poachers who trade in tiger fur and bone for traditional Chinese medicine. Director Alexei Vakhrushev films the pair at close range through a full season, catching Katia teaching the cub to stalk prey and defend territory while the surrounding taiga is logged and fragmented around them. Only a few hundred Siberian tigers remain in the wild, down from a range that once stretched into South Korea, and the film sets that number against footage of rangers tracking collared animals and researchers documenting kills and territory disputes. Scenes of rehabilitation centers show how orphaned or injured tigers are prepared for release, a slow process with no guarantee of success. The film stays close to Katia and her cub throughout, using their bond as the throughline for a broader account of a species running out of room.