Deep beneath the English Channel, a small army of terrorists seizes control of the Eurostar train to Paris, taking 400 hostages and declaring war on a government with its own secrets to hide. Sergeant Tom Buckingham, an off-duty SAS operative, is hiding somewhere inside the train. Alone and injured, he's the only chance the passengers and crew have of getting out alive. As Buckingham fights to thwart the terrorists and save everyone on board—including Delphine, the woman he loves—the story unfolds with relentless action and intrigue.