圭子と夫の昌三は、ひょんなことから強盗をし殺人までしてしまった。その事件で昌三は死んでしまい、圭子も懲役二十五年の判決を受ける。二人は、異常なほどの激しい肉欲で結ばれており、圭子の体は男なしでは生きていけない体になっていた。ある雨の日、圭子ら女囚たちは護送車で刑務所に運ばれていた。林の中を車が通りかかったとき、雨で土砂崩れが起き、突然岩石が落ちてきて護送車を一撃した。車は横転してひしゃげ、看守も女囚も圭子を残して死んでしまった。

As rumors spread about a hidden treasure worth 300 billion yen buried somewhere in the hills near a local inn and hot spring a large number of people check in with two things on their mind… treasure hunting by day and sex hunting at night. The geishas at the inn have their hands full as the inn is fully booked. A shrewd rich tycoon makes an offer to the owner to buy the inn. But she dismisses his offer and names a much higher price. The tycoon is reluctant until news that some actual gold pieces have been unearthed. But is the timing of this “news” a little too convenient?