Deep beneath the English Channel on a Paris-bound express, a crack team of East European terrorists has taken four hundred hostages at gunpoint - and declared war on a British government with more than its own fair share of secrets to keep. One man stands in their way: Tom Buckingham, an off-duty SAS soldier who is on board. With only a failing mobile to contact the outside world, he must use all his tradecraft and know-how to take out the enemy and secure the train. But the odds are stacked against him - twelve battle-hardened, tooled-up veterans of a bitter civil war to his one, unarmed and injured. And little does he know that someone on his own side is determined that no one will get out of that tunnel alive ...