Sianfong, the attorney for the prominent Hong Kong Yangs, discovers son-in-law Tungseung is embezzling from the family -- but flees to Thailand when Tungseung sends the brutal Green Dragon gang to silence him. Soon, Thai cop Tong (Panna Rittikrai) is on the case, battling the bad guys while he searches for Sianfong. Rittikrai, who also directed this explosive fight fest, is the mentor and trainer of international action star Tony Jaa.