Secret Squirrel and Morocco Mole stop a bank robbery and are called into headquarters by Double Q. They arrive and the chief tells them that Hy Spy has an invisible spy ship that he is going to use to destroy the city. Secret must find the ship and stop Hy Spy.
Secret and Morocco run into the ship, literally, and board it. Secret uses a spray that makes the ship reappear and then he and Hy Spy begin a duel of gadgets. Secret defeats everything Hy Spy throws at him. Secret then pulls a plug on the deck and the ship sinks.
Double Q calls Secret and Secret reports that the ship is sunk and that they are working on the capture of Hy Spy. Hy Spy is chasing he and Morocco around on a small island with a broom and is furious that Secret sunk his ship.