Plot summary
The brothers pose as the nephews of the wealthy and eccentric Quincy Endicott so they can steal two cents from him to pay for the ferry to get to Adelaide's house. Endicott tells them he has fallen in love with a ghost he saw one night, but fears he is going insane. While Wirt and Beatrice search for pennies, Endicott takes Greg and Fred to search for the ghost. Beatrice reveals to Wirt that she was once human, but she and her family were cursed by a bluebird and Adelaide is the only one who can change them back.
Wirt reveals he has a crush on a girl back home named Sara. They discover that the ghost is not a ghost but Endicott's business competitor, Margueritte Grey. They conclude that both of their mansions are so large that they are connected. They admit their love for each other and, thankful for his help for introducing them, each award Greg a penny. However, Greg discards the two cents in Quincy's fountain, claiming that he has "no cents, no cents at all". Fred stays with the two lovers as an official tea horse.
Credits
Adapted from Wikipedia contributors, Over the Garden Wall. Exact series, overall episode number and English title matched. Reference markers and illustrations removed; paragraph formatting adjusted.