In Europe a train carrying a deadly cargo has been hijacked. When the mission looks impossible, the world calls upon UNACO. Somewhere in Europe a train is carrying a deadly cargo of plutonium-IV packed in six reinforced steel kegs. But one of the kegs has been damaged! A unit of UNACO is sent to track down the kegs - and find out how and why the plutonium was stolen in the first place. Agents Sabrina Carver, Mike Graham and C.W. Whitlock find themselves up against a powerful conspiracy of interests, including a sinister arms dealer and a highly placed business magnate. Then comes the most frightening discovery of all. Only five of the kegs contain plutonium. The contents of the sixth keg could have catastrophic results for the whole of Europe for generations to come. And time isn't on their side!