That to do, if does a fate, assuming Catastrophe, play yet more wicked joke: fully buries the greatest branch of the Kyiv subway under the tons of breed, abandoning uncrippled two other? That, if do the ghosts of "red" branch remind about itself in every secret and riddle of all subsequent years? Unthinkable, that there anybody could to survive, but however.Stalkers of Cross - the concord of the stations located under Kyiv both the survivor branches - during a next sally find on the surface of unknown man in a strongly threadbare protective suit. He is stranger in the world of subway, and nobody can say, who he and from where, except a local girl with the damaged reason and psychology of child. To knock to her memory, a help is required someone, who will be able to find a method to talk with her. Child's teacher Ион undertakes to accompany a girl on other end of Cross, in remote and wild districts, to find a doctor to her. Someone tries to prevent them, not stopped before anything. Someone, still keeping the secrets of "red" line.