[Machine Translation] Destroy an international arms smuggling ring. Customs Marine Headquarters vs. International Arms Smuggling Organizations! The front line of the pursuit, "Front Line", burning hotly in the seas of Hong Kong. An authentic maritime action film depicting the desperate struggle of those who protect the sea! Chow, an elite officer of the Hong Kong Customs Marine Division, seizes a large quantity of military weapons from a cargo ship with his superior and confidant, Chun. Behind the seizure is the shadow of an international arms dealer, Dr. Lowe. In collaboration with Interpol, Chow goes abroad in pursuit of the truth, but behind the scenes, a national-level conspiracy is swirling. Meanwhile, Chun, who has always supported Chow as a calm leader, is in the depths of despair as corruption in the organization and his own mental illness take their toll. Martyrdom, betrayal, and the shocking truth that tears apart the bond between master and disciple. Can Chow crush the ambitions of the arms dealers and restore justice to the waters of Hong Kong? The battle is about to begin. 4C picture label.