Pinkie Pie finds herself in England of 1965, at the height of the British Invasion. She meets four humans who take care of her, and they happen to be the band The Who. But, she forms a special friendship with the drummer, Keith Moon, who, even though he's more crazy in some areas, is just as off the wall as her.

Will she ever go back to Equestria, or will she stay with the band for the rest of her life? Will her and Keith always be best friends?