Gulf War veteran SAS trooper Chris Ryan is pushed to his limits as he is hunted down by a crack force of former Special Forces soldiers in the most extreme environments on Earth. After parachuting into hostile wildernesses, including Siberia, Botswana and Honduras, Ryan has a matter of minutes to escape before the Hunter Force is unleashed. Hounded by helicopters and heatseeking devices, Ryan has to use every trick he learned as a soldier to evade capture and cover his tracks in a game with no rules.