Epstein's younger sister is enrolled in Kotter's class and Arnold is immediately attracted to her, but so is Vinnie, and this drives Juan crazy. Freddie is also in a romantic mood and Kotter sees it as an opportunity to teach the Sweathogs about love.

Barbarino wants revenge after a gym teacher slaps him in the face.

The Sweathogs join the school newspaper and investigate the break-in at the principal's office. During their investigation, they discover some shady happenings at Buchanan High School.