Rock (Okajima Rokuro) was merely an ordinary Japanese businessman, but through a chain of improbable events, he became part of the "Lagoon Company," a crew of transporters who engage in some piracy on the side. Alongside Dutch, Revy, and Benny, he navigates the Asian seas aboard the modified torpedo boat "Black Lagoon." Their headquarters, the lawless city of Roanapur, hangs precariously on the edge of all-out war, dominated and occupied by criminal syndicates from around the world. At the top of this hierarchy stand Balalaika from Russia and Chang from Hong Kong. The narrative picks up in Roanapur shortly before Rock, accompanied by Revy, is scheduled to return to his former home in Japan. It is a story about soldiers who once fought together under a shared cause in a land of sandy winds, and the strictly personal reunion of a captain with her former subordinate...