Zhamin, a member of a geological expedition and a former criminal, receives a strange letter, after which he quits his job and hurries through the taiga to a nearby station. In the city it is necessary to leave and his main enemy Legostaev, whom Zhamin has long threatened to kill. Zhamin comes to the station alone. He‘s found to have a bloody knife and a large sum of money with him.

Three kids from a coastal village in the Far North discover an old rifle in a cave. They learn about a national hero Guriy Gagarka and organize an expedition to gather more info on him.