Arsène Lupin III has found the perfect birthday gift for his girlfriend Fujiko Mine. It is the Black Panther, a unique emerald that, if seen from a certain angle, seems to contain a panther. Lupin steals the emerald and hides it within a statue, intending to come back for it later. But when the emerald gets accidentally transported to a nude resort, Lupin, Jigen and Goemon must go undercover (in a manner of speaking) to retrieve it. Complicating the matter as always is Inspector Zenigata, who is joined by the interfering Inspector Conaiseau.
—Tenchi