Assistant Police Inspector Saburo Tatsuno, a former jazz pianist, is assigned to uncover a narcotics ring. But he falls victim to the seductive wiles of Maki, the beautiful night club singer and one of the leaders of the ring. One by one, Maki's discarded lovers vanish and Tatsuno faces a similar fate. Tatsuno confesses to his identity under torture and this leads to the murder of his undercover colleague. He realizes that his career is ruined and this, plus Maki's charm, induces him to join the smugglers. Before submitting his resignation, however, he leads the police on a wild-goose chase while a big narcotics transaction is taking place in another part of town, and this puts him among the leaders of the underworld. When Maki turns her attention to a youthful singer, Tatsuno realizes that he has gambled his whole life and lost. So he stabs the tantalizing beauty, and is in turn shot down in a gangland revenge killing.

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