Two 20th century youngsters, Andy and Karen, are accidentally transported back to the year 100,000,000 B.C. by their father's time machine. While dodging dinosaurs, the kids find a loyal friend in the form of Bunjee, a lovable, purple-haired creature who resembles an elephant with suction cups for feet. After escaping danger, Andy and Karen bring Bunjee with them when they return to the present. Alas, Bunjee is hardly ready for modern civilization, and vice versa.