She's 18. She's great-looking. And now Terry Grifith is about to set off an epidemic of comic hysteria when she enrolls in a new high school... as Just One of the Guys! Terry (Joyce Hyser) blames sexism after her journalism teacher refuses to enter her article in a competition to win a summer internship on the local newspaper. With the help of her kid brother, Buddy (Billy Jacoby), she masquerades as a male at a rival school and enters the contest there. During her charade, "Terry the Boy" tangles with a vicious bully, Greg (William Zabka), and fends off an amorous classmate, Sandy (Sherilyn Fenn). But when she falls for a handsome loner, Rick (Clayton Rohner), our hero/heroine must find a way to convince him that she's not Just One of the Guys!