In the world's most harsh and notorious Bangkok suburb of Komprai Prison, known as the "Bangkok Hilton", there are ten rules: if you don't follow them, you are very likely to die; if you follow them, you will definitely die - this is the true story of Billy Moore's personal experience. However, Bill refused to compromise and was unwilling to die in prison. He began to learn Muay Thai in the face of death, finding brotherly friendship in the process and embarking on an incredible road to redemption.