Heather the pig has it all: a lovely farm to live on in the Scottish countryside, apples of all kinds to devour, and a doting best friend in the farmer's daughter, Isla. Unfortunately, Heather's idyllic existence is shattered when Isla's dad has to sell the farm to pushy Farmer Busby and move with Isla to far-off London. Heather is bereft—but determined to reunite with Isla somehow. She gets her chance when she becomes the unlikely star of Busby's new advertising campaign to promote the farm. In no time, Heather is being whisked to London for a film shoot! Her handlers have big plans for Heather in this glamorous city, but pig-headed Heather has other ideas. After a daring escape, Heather is on the run and in pursuit of Isla! Finding her shouldn't be difficult, Heather reasons. After all, how many girls with freckles can there be in London?