In the experimental clinic, a batch of valuable drug was stolen. Major Grigast suspects that someone from the clinic is involved in this. He entrusts this complex matter to a young investigator Mara. An investigation leads her to a distant border town in the south of the country, where the offender intended to ship the drug abroad.

In order to negotiate with West German financiers about the construction of the gas pipeline between Siberia and Western Europe, a delegation of Soviet foreign trade collaborators flies to Germany, where they immediately come under CIA surveillance: U.S. intelligence agencies are interested in disrupting the 'contract of the century.' ”...

Intelligence-diversionary group of athletes who know how to shoot snipers, run, jump, feel free in the water and under water, to withstand the monstrous load of hand-to-hand fights, will be able to reach the goal only going together, passing the task as a relay. Seven of them. Among them is a girl swimmer. It will be the most difficult, the last stage of the journey. The plot is based on the real facts of the great Patriotic war.

For many years, a prominent scientist had been striving to solve the problem of immortality. He shared the results of his daring and risky experiments with his colleagues. But one day something happened that no one could have foreseen: the professor had disappeared. The best student and follower of Professor Dowell tries to use the results of his scientific research for criminal purposes.