Mr. Kite (
George Burns), elderly mayor of the small, wholesome town of Heartland, recounts the history of Heartland's celebrated marching band. Sgt. Pepper and his Lonely Hearts Club Band brought happiness through its music, even causing troops in World Wars I and II to stop fighting. On August 10, 1958, Sgt. Pepper died of a heart attack at the unveiling of a new weather vane in his likeness. Sgt. Pepper left the band's magical musical instruments to the town; so long as they remain in Heartland, its people will live happily ever after. He also left his musical legacy to his handsome and good-hearted grandson, Billy Shears (
Peter Frampton). Billy forms a new Lonely Hearts Club Band with his three best friends: brothers Mark, Dave, and Bob Henderson (
the Bee Gees). Billy's charming but avaricious half-brother, Dougie (
Paul Nicholas), serves as the band's manager ("
Sgt. Pepper's Lonely Hearts Club Band"). Heartland loves the new band ("
With a Little Help from My Friends"), and soon Big Deal Records president B.D. Hoffler (
Donald Pleasence) invites them to Hollywood with the promise of a record deal ("
Fixing a Hole"), which the band accepts ("
Getting Better"). Billy bids farewell to his sweet hometown girlfriend,
Strawberry Fields (
Sandy Farina) ("
Here Comes the Sun"). Once in Hollywood, B.D. introduces the band to their new labelmates, sexy singers Lucy (Dianne Steinberg) and the Diamonds (
Stargard), and they negotiate the contract over a sex-and-drug-fueled dinner ("
I Want You (She's So Heavy)"). Hitting it off with Lucy, Billy all but forgets about Strawberry. The band quickly succeeds ("
Good Morning, Good Morning"), with hit records and sold-out concerts produced and performed as quickly as they succeeded ("
Nowhere Man"/"
Polythene Pam"/"
She Came In Through the Bathroom Window"/"
Sgt. Pepper's Lonely Hearts Club Band (Reprise)"). Meanwhile, villainous Mr. Mustard (
Frankie Howerd) and his henchman, the Brute, drive to Heartland in their computer- and robot-equipped van, under orders from the mysterious FVB to steal the magical instruments from City Hall and distribute them among FVB and its affiliates ("
Mean Mr. Mustard"). Without the instruments, Heartland quickly degenerates into a hotbed of vice and
urban decay. Strawberry takes an early morning bus to Hollywood ("
She's Leaving Home") to warn the band ("
Lucy in the Sky with Diamonds"/"
Oh! Darling"). Mustard, who has a crush on Strawberry, follows. In Hollywood, the band and Strawberry steal Mustard's van and use its computer to locate the stolen instruments, recovering the cornet from the deranged, money-driven anti-aging specialist Dr. Maxwell Edison (
Steve Martin) ("
Maxwell's Silver Hammer"), and the tuba from mind-controlling cult leader Father Sun (
Alice Cooper) ("
Because"). Billy is knocked out in each battle, with nothing except Strawberry's love keeping him going ("
Strawberry Fields Forever"). The group easily find the bass drum, which Mr. Mustard kept for himself in the van. However, the computer and robots malfunction and self-destruct before they can locate the final missing instrument (the saxophone). As Heartland deteriorates further, Dougie and Billy and the Hendersons convince B.D. to organize a benefit concert which will save the town ("
Being for the Benefit of Mr. Kite!"). Dougie and Lucy, who have bonded over their shared love of money, plot to run off with the show's proceeds ("
You Never Give Me Your Money") while Billy, Strawberry, and the Hendersons are watching
Earth, Wind & Fire perform at the benefit ("
Got to Get You into My Life"). Mustard and the Brute suddenly arrive and take back the van, containing the recovered instruments and the benefit money, and also kidnap Strawberry ("
When I'm Sixty-Four"). Billy and the Hendersons see the van leave and pursue it in the town's hot air balloon. Mustard drives to FVB's headquarters, where the Future Villain Band (
Aerosmith) plans to take over the world. To turn Strawberry into a "mindless groupie", FVB chains her up onstage while the band plays ("
Come Together") and the lead singer (
Steven Tyler) fondles her. Billy and the Hendersons arrive and engage FVB in hand-to-hand combat. The singer is thrown off the stage to his death, but so is Strawberry. The town of Heartland, now cleaned up and the instruments returned, holds an elaborate funeral for Strawberry ("
Golden Slumbers"/"
Carry That Weight"). The depressed Billy attempts to get Strawberry off his mind ("
The Long and Winding Road"); when he cannot, the Hendersons worry for him ("
A Day in the Life"). Billy finally attempts suicide by jumping from a rooftop. Before he can hit the ground, in a form of
Deus ex machina, the Sgt. Pepper weather vane atop City Hall comes to life (
Billy Preston). Wielding magical lightning bolts, the weather vane catches Billy and reverses his suicide attempt, then dances through the town square ("
Get Back"), transforming Mustard and the Brute into a bishop and a monk, Mustard's van into a
Volkswagen Beetle, and Dougie and Lucy into a priest and nun. The weather vane restores Strawberry to life and transforms the Hendersons' mourning suits into shiny new uniforms. In the finale, the cast appears with numerous celebrities in a tribute to the original
Beatles album cover ("
Sgt. Pepper's Lonely Hearts Club Band (Finale)"). ==Featured performers==