A woman named Yukie gets into a minor traffic accident with Taketo, the son of a wealthy businessman. Yukie is being asked to pay a huge sum of money to cover the damage, but she can't afford it and so she is coerced into signing a settlement paper of a dubious nature. Soon Taketo is blackmailing Yukie for sex... what's more, Taketo's father Mr. Nogawa and his sexy private secretary Yumi decides to join in the fun by blackmailing Yukie's two pretty teen daughters, Rumi and Tomoko.