Two 20th century youngsters, Andy and Karen Winsborrow, are accidentally transported back to the year 100,000,000 B.C. While dodging dinosaurs and surly cavemen, the kids find a loyal friend in the form of Bunjee, a lovable, orange-haired creature who resembles a flying elephant with suction cups for feet. Returning the courtesy, Andy and Karen bring Bunjee with them when they return to the present. Alas, Bunjee is hardly ready for modern civilization, and vice versa.