The film follows Dmitry Vlasov, a biologist, conducting field research across the ecosystems of Russia’s Yaroslavl Region, documenting rare and protected species for the next edition of the Red Data Book. From wetlands and forests to lakes, the biologist explores fragile habitats and the species that depend on them. Blending scientific documentary with first-hand field observation, it reflects on the delicate relationship between people and nature as landscapes disappear.