 Their ship is disabled in a storm, and the two girls are set adrift in a lifeboat with four babies, the children of fellow passengers.The craft eventually drifts to a tropical island, and in a Robinson Crusoe-like scenario, they must learn to build shelter and survive on wild foodstuffs.They do this with great success, while raising the babies through various developmental milestones and adopting a baby monkey who they raise alongside the babies.