A documentary investigation of a sensational event hidden from society for forty years, namely, the jump of two Soviet paratroopers, Pyotr Dolgov and Evgeny Andreev, from the stratosphere from a height of 25 km. The secrecy of this experiment, conducted in 1962, and the death of one of Dolgov's testers deprived the heroes of their well-deserved fame. The investigation conducted by the author of the film, the analysis of materials declassified on his initiative, made it possible to restore the details of the event and return the names of the heroes to the public