A new student comes to Flatpoint High, who turns out to be a bully who everyone is afraid of. When Jerri stops a fight with the bully and her friend Tammy, the bully schedules a fight for after school. Everyone keeps telling Jerri that she shouldn't fight and find peace, but Jerri feels she should live by the street code and fight. Geoffry gets a bully of his own when a homosexual hater substitute confronts him.
Jerri is asked out at a school wrestling game, but the boy later takes back his offer because other boys are saying mean sexual things to Jerri and she does nothing about it. So Tamela tells her she was a victim of sexual harassment and she needs to stick up for herself. Jerri later starts liking another guy, but is afraid it will end soon because of the other guys harassing her.
Jerri and class hunk Laird are having a fling, but he is insistent on keeping it a secret. So Jerri finds herself forced to hide out in odd places like Laird's locker, the trunk of his car, a trash can, etc., so they can continue their secret rendezvous. Meanwhile, Jerri's stepmother experiences relationship troubles with Stew, prompting an unusual bonding moment between stepmother and stepdaughter.
After deflowering a male classmate, Jerri finds out that she has contracted a series of STDs (syphillis infested with crabs which are carrying gonorrhea) and must inform all her partners of her discovery. Meanwhile, Mr. Jellineck and Mr. Noblet have problems concealing their own bout with a particularly noticeable STD.