Swifty the Arctic Fox (Jeremy Renner) works in the mailroom of the Arctic Blast Delivery Service, but he has much bigger dreams. He yearns to become a Top Dog, the Arctic's star husky couriers. To prove he can do it, he commandeers one of the sleds and delivers a mysterious package to a secret location. Once there, he stumbles on a hidden fortress overseen by the nefarious Otto Von Walrus (John Cleese). The blubbery evil genius commands an army of oddly polite puffin henchmen. Swifty discovers...