Seven years after the roundup in Vietnam, Ma Seok-do (Don Lee) joins a new squad to investigate a murder case. Soon, he finds out this case involves busting a synthetic drug, Hiper, and starts to dig deeper. Meanwhile, the Japanese mafia boss behind it all, Ichizo (Jun Kunimura) won’t stop looking for trouble, and the Japanese drug distributors Ricky (Munetaka Aoki) and his gang come to Korea to join the chaos. Things are just about to get out of hand...