Among the ranks of the most difficult military training on the planet, BUD/S (Basic Underwater Demolition/SEAL) includes the ultimate challenge of endurance known as Hell Week. It's the pivotal test faced by every Navy SEAL: 120 sleepless hours of relentless physical punishment, interrupted only by hypothermia-inducing surf torture. Ensign Grey thought he knew what to expect, but when Seaman Murray attempts to blackmail an instructor who is determined to see him fail, Hell Week takes on a new meaning. With deteriorating health and a dangerous enemy in hot pursuit, the two unlikely friends struggle to survive. What happens in the darkness at the edge of the Pacific will change their lives forever.