Bubbie and Flapjack meet the twin brother of the evil inventor from Several Leagues Under the Sea, and Bubbie tries to help him accomplish his and her dreams of creating a flying ship. However, it would seem that the twin brother is actually in love with Bubbie, leading to one dangerous adventure above the raging sea. Peppermint Larry offers free candy for used candy wrappers, especially the one mysteriously marked X, so K'nuckles abuses Flapjack's trust to get them.