High school student Freddie Trimball bears an uncanny resemblance to famous radio singer Frankie Troy. When Troy goes missing, people mistake Freddie for the singer, and further complications ensue when Troy's wife and child show up.

A rich man's son runs for student president at the local high school, and the father tells the school principal that if his son wins, he'll make a sizeable donation that will cover the football team's uniforms.

The football team can't score a win, the paper is on the outs, and the musical is booting performers. Can the plucky band of Whitney High students turn it all around?

Miss Hinklefink inherits a western ranch, and to spend the summer with Professor Townley, she invites Freddie, Dodie, Betty, Lee, and Roy to spend their vacation on the ranch if Townley will chaperone. Meanwhile, a real estate agent tries to persuade her to send the kids home when desperadoes rob the bank.

A Marine Sergeant wounded in overseas combat service requires an operation, and the Navy psychiatrist recommends that 'Sarge' be given a few weeks' rest before hospitalization. Through the Dean of San Juan Junior College, Sarge enters the school on a temporary basis. Meanwhile, the Teen-Agers are rehearsing a show and Freddie is worried because they have no band. Through a series of romantic entanglements, will they be able to put on the big show?

The growth of small town juvenile crime starts a movement for the building of a youth center. The project leaders discuss with the mayor about buying an old warehouse and rebuilding it as the Center. However, the mayor has other plans. Freddie, Dodie, Lee, Betty, Roy and Monogram's other non-delinquent juveniles, now attending junior college, think otherwise.

A photographer is murdered just outside of where a college dance is being held. The body is discovered by Lee Watson, but promptly disappears, as it's whisked around the campus by an ex-con night watchman. However, he is not the killer, and Freddie, Betty, Dodie, and Lee set out to find the culprit, who managed to put a big damper on the big dance.

Bickering brothers Phil and Freddie Russo unwittingly wind up working together on the same musical production.