While enjoying a triumphant world tour, the Muppets get tangled up with a criminal mastermind named Constantine, who is out to steal an enormous diamond and happens to be a dead ringer for Kermit.

While enjoying a triumphant world tour, the Muppets get tangled up with a criminal mastermind named Constantine, who is out to steal an enormous diamond and happens to be a dead ringer for Kermit.