This is the story of a little penguin named Mumble who has a terrible singing voice and later discovers he has no Heartsong. However, Mumble has an astute talent for something that none of the penguins had ever seen before: tap dancing. Though Mumble's mom, Norma Jean, thinks this little habit is cute, his dad, Memphis, says it "just ain't penguin." Besides, they both know that, without a Heartsong, Mumble may never find true love. As fate would have it, his one friend, Gloria, happens to be the...