Terror strikes the underground train system in Moscow in the form of a flood from a collapsed tunnel. The film follows a diverse group of Moscow citizens who find themselves trapped in the city’s underground rail network, their train derailed and virtually crushed after an aging tunnel collapses. Amongst this band of survivors is softly spoken surgeon Andrey (Sergei Puskepalis), whose wife is having an affair with the conceited businessman Vlad (Anatoly Beliy). Fate brings these two men together on the same doomed train, but there is little time to resolve their differences, as the tunnel begins to quickly fill with water, forcing them to work together with the others and find a way back to the surface.
The story of a young girl who believes in miracles. The guys do not pay any attention to her, at work, her ideas are stolen and used, friends consider her a little strange, but the young girl does not lose heart and continues to believe in a prince on a white horse. And one day he appears. Handsome, young, he is subject to magic, and henceforth her feelings. How now not to believe in a fairy tale when she herself was in it?... The long-awaited prince will make her life truly magical.