Continuing their quest to free the animals at the Gnoo Zoo Carousel, Big Billy the panda bear and his friends - Miss Marbles, a vain ostrich; Einstein, an intelligent elephant; and the tomboy chimp twins, Chattaboonga and Boongachatta - turn to the Great White Tiger's friend the Snowkeeper for help. But when the penguins gruff attitude hurts Miss Marbles's pride, she refuses to obey his instructions -- and big trouble results.