Oversexed schoolgirl prostitutes reveal exactly how they became involved in the world's oldest profession after an irate customer lands them all in court. When the client at a clandestine brother is rejected by the owner's sister, he blows the whistle on the house of ill-repute. Later, as the case goes to trial, each young prostitute takes the stand to reveal their reasons for selling their bodies. For Helga, it was all about making the grade; when her horny male classmates offered to do her homework in exchange for sex, it seemed like the perfect way for the horny student to maintain her marks and satisfy her sexual cravings at the same time. Meanwhile, brainy Karla uses her intelligence to bed her father's work colleague, irresistible hitchhiker Monika seduces male drivers while fleecing them for cash, a Prussian teacher contends with a classroom full of randy Bavarians, and smitten young student Gaby assumes a new identity in order to seduce her favorite teacher.