Cave Queens

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 Shinichis ship is seajacked by another drug gang an outraged Iwahara suspects him of treachery and has him beaten and confined in a dungeonlike 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