 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...