Knights of Heaven

A group of mountain climbers has been specially selected to carry out a secret military mission. The fate of humanity depends upon their success. The rules of the mission require the death of each participant once his or her task is accomplished. After killing one of their colleagues and splitting into several groups, the mountain climbers continue their journey. But the human subconscious doesn't follow military orders. Having once committed murder, the 'knights' cannot control their desire to kill. They forget their mission, and kill each other instead.