The film is about a generation of brave and beautiful people who did not see the destruction of the revolution and the chaos of the civil war, who dreamed of building a new life in which there would be no place for death, but only incredible love that opens the way for them to great achievements and discoveries. About exploits and glory, betrayal and loyalty of those who were heroes in heaven and on earth. About the time of immense trials that fell on their short but bright lives. About a woman who was the dream and true love of the Soviet Union.

Former military pilot Shaposhnikov is investigating the case of the disappearance of a passenger plane in 1998. The case unexpectedly develops in the present, when one of the passengers of the disappeared flight gets through to his family. Anna, a journalist, is involved in the case, who knows this mysterious story firsthand.

Investigator Sergei Smirnov, must return to the city of his childhood to investigate some high-profile murders. In Crystal city, there is a maniacal pedophile on the loose. Not only does he torture and kill children, he does it in a devious, brutal way. Sergei is the best in his field, so he entrusted with the investigation. Sergei has a complex character; the hero has obviously been through a lot, and his most terrible secrets are buried here, in Crystal city, where Sergei was born and raised.