Follow mixed martial artist Jason Chambers and former football pro Bill Duff as they put their bodies on the line as they train in the most lethal forms of combat. Go across the globe to learn the history, style and methodology behind 16 unique forms of combat. On their quest to master everything from karate to Muay Thai and Eskrima stickfighting, Jason and Bill explore ancient relics, unusal villages, breathtaking landscapes, and hidden pasts in order to truly understand the complex development of each individual form. They study with legendary masters and face intense challenges before putting their newfound skills to the test in a final bout with a master in the discipline.