Markus, a deployed military man, has to go home to his teenage daughter, Mathilde, when his wife dies in a tragic train accident. It seems to be plain bad luck - but it turns out that it might have been a carefully orchestrated assassination, which his wife ended up being a random casualty of.
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.
A hardened convict and a younger prisoner escape from a brutal prison in the middle of winter only to find themselves on an out-of-control train with a female railway worker while being pursued by the vengeful head of security.
An ordinary man makes an extraordinary discovery when a train accident leaves his fellow passengers dead—and him unscathed. The answer to this mystery could lie with the mysterious Elijah Price, a man who suffers from a disease that renders his bones as fragile as glass.