Aboard a night ferry in the Inland Sea, Masaaki Kagari (Akira Kobayashi), a young tough, who supplies hostesses to night spots, encounters Yuko, his ex-sweetheart. He considers himself a private underworld sort of policeman-in the com- munity of such women. Yuko, now a bar proprietress, is under the protection of Tahei Daigo, a sinister gang boss who in his quest for chances of good investments abroad plans to offer young girls to rich foreigners. Asked to gather attractive girls by Yuko, now Tahei's puppet, Masaaki collects many only to find them mysteriously missing...

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