Bound for a London show from Liverpool, the Beatles escape a horde of Fan (person) ("A Hard Day's Night"). Once they are aboard the train and trying to relax, various interruptions test their patience: after a dalliance with a female passenger, Paul's grandfather is confined to the guard's van and the four lads join him there to keep him company. John Lennon, Paul McCartney, George Harrison and Ringo Starr play a card game, entertaining some schoolgirls before arriving at their desired destination ("I Should Have Known Better").
Sir Ringo Starr finds himself the human sacrifice target of a cult, and his fellow members of The Beatles must try to protect him from it.
Pepperland is a cheerful, music-loving paradise under the sea, protected by Sgt. Pepper's Lonely Hearts Club Band. The titular Yellow Submarine rests on an Aztec-like pyramid on a hill. At the edge of the land is a range of high blue mountains.