Series in which a group of athletic adventurers from the UK and the USA compete for glory against tribal champions in some of the remotest corners of the globe, with the ultimate aim of being crowned the last man standing. They take on the Sumi, a tribe of former head-hunters in Nagaland in northern India. Their goal is to become Aki Kiti fighters, a vicious martial art where the soles of your feet are your only weapons and your only defence.