Ryo Saeba, the famed "City Hunter," has been hired by James McGuire, the president-elect of a newly-freed South American country, to protect one of the members of the Japanese Secret Service assigned to his protection detail. The young woman happens to be McGuire's daughter and has been targeted for assassination over a fabulous cache of diamonds that McGuire had discovered while still a freedom-fighter. Saeba, while protecting his charge, also takes it upoin himself to try to get some "mokkori" action going with her...