Plot: Two trains crash somewhere in Russia, one carrying a nuclear payload. A nuclear explosion follows the crash and the world is on alert... However, White House nuclear expert Dr. Julia Kelly (Nicole Kidman) doesn't think it was an accident... Special Forces Intelligence Officer Colonel Thomas Devoe (George Clooney) doesn't think so either... Together they must unravel a conspiracy that goes from Europe to New York, to stop a terrorist who has no demands...