On vacation in Los Angeles, Walter, the world’s biggest Muppet fan, and his friends Gary and Mary from Smalltown, USA, discover the nefarious plan of oilman Tex Richman to raze the Muppet Theater and drill for the oil recently discovered beneath the Muppets' former stomping grounds. To stage The Greatest Muppet Telethon Ever and raise the $10 million needed to save the theater, Walter, Mary and Gary help Kermit reunite the Muppets, who have all gone their separate ways: Fozzie now performs with a Reno casino tribute band called the Moopets, Miss Piggy is a plus-size fashion editor at Vogue Paris, Animal is in a Santa Barbara clinic for anger management, and Gonzo is a high-powered plumbing magnate.