Archaeologist Katya Egorova embarks on an expedition to Altai with her son Kolya, unaware that she will find herself in the middle of a struggle for the mystical belt of the Scythians, which gives its owner incredible power. A powerful artifact is being sought by an influential businessman Tikhomirov, whose ancestor found one of the three parts of the belt and left a map. Sasha, a black digger, helps the businessman in his search, but without Katya's experience, it is not possible to put the belt together. Tikhomirov threatens the girl, so she agrees, not knowing that her ex-husband Vadim is also hunting for a powerful object.