Twelve hundred British soldiers trapped on a nearby island, with no hope of rescue from Allied ships, waiting to die. Keith Mallory, world-famous mountaineer, skilled saboteur. His mission: to lead a small team of misfits and silence the guns forever. Reaching the island and scaling the sheer cliffs undetected will be hard enough; defeating the German forces and destroying the massive guns all but impossible. And as for getting out alive when there may be a traitor in the team...