10 years ago in Bangkok, Thailand, Jake Donahue's brother Sean is ruthlessly killed in the street by Khan. Jake, just 14 at the time is physically and emotionally scarred. Flash forward to present day New York, where Jake is now a courageous cop who coincidentally gets picked to go undercover for an operation in... Thailand. Jake walks into the lion's den: his bosses think he is there to bust up the snuff film operation, but he is really stalking his brother's killer. When Jake and Khan finally meet, it will decide who really is "The King of the Kickboxers".