Kurt Sloane, a seasoned martial artist, finds himself once more drawn into the brutal underground world of kickboxing in Thailand. After achieving a major victory, Kurt hopes to leave his violent past behind and pursue a normal life with his wife, Liu. However, their peaceful existence is shattered when he is forcibly taken back to Thailand. There, a vengeful fight promoter, Thomas Moore, coerces Kurt into participating in a deadly series of matches by kidnapping Liu. Kurt must use his formidable skills to navigate through a gauntlet of lethal opponents, enduring grueling training and heinous challenges along the way.

Caught in a labyrinth of deceit and violence, Kurt discovers that his ultimate opponent is not only a near-superhuman fighter but also someone who possesses a dark connection to his past. With each fight, the stakes grow higher, forcing Kurt to push beyond his limits to reunite with Liu and reclaim their future. Along the journey, alliances are tested, and Kurt realizes that the fight is not just about survival but about securing justice for those he loves. As the final confrontation draws near, Kurt is prepared to lay everything on the line in one last battle that will determine his fate and his freedom.