High in the Himalayas the daughter of an English earl is kidnapped by a huge hairy monster. His motherless children need help. Years later Agatha Farlingham has raised a yeti family with upright morals and impeccable manners. But when their secret existence is discovered, the yetis must leave their idyllic valley. Two brave children hatch a daring plan to smuggle them across the globe to Agatha's historic mansion. Hilarious disasters ensue as the yetis meet the outside world — but a terrible shock awaits them at Farley Towers ...