Phineas and Ferb always enjoy a good show. So when they hear that Cirque du Lune is coming to town, they can’t wait to see it. And when the performance is cancelled, Phineas and Ferb decide to put on their very own circus show! With Phineas as the ringmaster, their acts of mud-diving and hoop-jumping are soon bringing the house down. Even Perry the Platypus gets in on the action! But Candace suspects her pesky brothers are up to something. When she tries to stop them from clowning around, will the show go on?