"Where is Biff Hooper? The Hardys' friend secretly went off to a survival game camp in Georgia--and never came home. But before leaving he did tell Joe. So when Orville Brand, the camp director, claims Biff was never there, the Hardy boys suspect foul play.
Under cover of darkness, Frank and Joe break into the camp grounds. To their amazement they find the Ultimo Survival Camp is actually a training site for an elite corps of attack troops, led by a shadowy strongman named Hammerlock. Suddenly the brothers are trapped in a real-life struggle for survival against the toughest enemy they've ever had to face..."