A bright young yeti finds something he thought didn't exist—a human. News of this “smallfoot” throws the simple yeti community into an uproar over what else might be out there in the big world beyond their snowy village.

Three teenagers must help a Yeti return to his family while avoiding a wealthy man and a zoologist who want him for their own needs.

Connie Hayward mounts an expedition into the Himalayan Mountains looking for her brother, who has not returned from a previous trek trying to locate the Yeti, or "Abominable Snowman". Arriving at her brother's last-known camp Connie and her companions find only a strange old guide, Varga. They are soon attacked by gigantic Snowmen but are not half as surprised as when Vargas reveals his secret origin and the plans he has for Connie.

Paul Wegener gives one of his most active performances here as Captain Ramper, a heroic aviator who makes a pioneering flight across the Arctic accompanied only by Ippling, his faithful mechanic (Kurt Gerron). Near the North Pole, their plane develops engine failure and crashes in the desolate wastes. Ippling dies straight off but Ramper finds a supply base containing food which has been left behind by a previous expedition. After fifteen years in the Arctic wastes, Ramper has considerably mutated.