When Mickey discovers a super-villain named Megamort is trying to shrink the Clubhouse, Professor Von Drake uses a machine to turn the Clubhouse Gang into Clubhouse Heroes!
With their superhero powers gone, the Clubhouse Heroes learn that they must work together to be super-duper and stop Megamort! Up and away to save the day!
The Clubhousers are spending the day at the beach, when Pegleg Pete sails to shore with a note from Goofy's long lost Grandpappy, Captain Goof-Beard.
Avast maties! The Clubhousers must play instruments to find the treasure before Harmony Chord Island sinks!