On August 2008, twenty-four climbers from several international expeditions converged on High Camp of K2, the last stop before the summit of the most dangerous mountain on earth. Forty-eight hours later, eleven had been killed or had vanished, making it the worst K2 climbing disaster in history. At the heart of The Summit lies a mystery about one extraordinary man, Ger McDonnell. By all accounts, he was faced with a heart-breaking dilemma-- at the very limit of his mortal resources, he encountered a disastrous scene and a moral dilemma: three climbers tangled up in ropes and running out of time. In the death zone, above 8,000 metres, the body is literally dying with each passing second. Morality is skewed 180 degrees from the rest of life. When a climber falls or wanders off the trail, the unwritten code of the mountain is to leave them for dead. Had Ger McDonnell stuck to the climbers' code, he might still be alive.