Dominic Badguy (Ricky Gervais), the Muppets' new manager, convinces the gang to embark on a world tour. Kermit the Frog doubts that it's a good idea -- a feeling that's proven right when look-alike Constantine escapes from prison, takes Kermit's place, and lands Miss Piggy's sweetie in a Siberian prison. While the frog tries to convince his captors of his true identity, Constantine and Dominic are free to carry out their plan to steal London's crown jewels.