Famed detective Dandy Sashichi tries to solve who's behind the serial murders of six beautiful women under the aegis of local showman Ibaragiya. The film opens with the sextet humiliating a respected painter's portraits of them, driving the man to a sus­picious suicide. Later, while celebrating his son's impending marriage into a wealthy family, Ibaragiya releases six pigeons from a pleasure boat, each with a rolled up drawing of one of the beauties tied to their legs. He offers a cash reward to whomever recovers the pictures, but they instead become death notices of which of the six are next to die.

Sashichi investigates the mysterious murders of four beauties, all of whom were stabbed in the chest.

Japanese crime film.

Rumi (Yoko Mihara) and Emi (Masayo Banri) are sisters who dance nightly at the Blue Moon cabaret, which happens be the headquarters of a drug ring. Offstage, Rumi captivates the gang boss, Iwahara (Shuntaro Emi); while Emi attracts the portly club manager, Yajima (Saburo Sawai). Meanwhile their older brother Shinichi (Ryo Kuromaru), a seaman, is unwittingly assisting Iwahara with his drug running. When Shinichi’s ship is sea-jacked by another drug gang, an outraged Iwahara suspects him of treachery and has him beaten and confined in a dungeon-like basement. Rumi and Emi try to free him, but a gang hitman discovers them - and their attempt ends in failure. Now under suspicion themselves, the girls try to escape, but luck goes against them and they are taken to an island where Iwahara and his crew plan to ambush the rival gang.

Kizaki, an upstart at a trading company has one more assignment for the day before meeting his lovely girlfriend, Natsuki for a date. Little does he know that he's walking straight into a trap set up by his boss, Asanuma and his murderous right hand man. The next day Kizaki finds himself framed for the murder of the company president, and the robbing of the company safe. Natsuki innocently waves goodbye to her loved ones as the boat sails only find herself caught in Asanuma's evil scheming and the object of his lust. In a desperate attempt to escape, she falls to the watery depths. When we next see her she has washed ashore like a siren in the nude on a deserted island inhabited by five castaways who fight each other for her. She learns there's a rich wealth of clams underwater and eventually comes into a large fortune in pearls. Once rescued, she returns to Japan with revenge on her mind.