Plot summary
Wirt, Greg, and their frog come across an isolated cottage. Inside, they meet a girl named Lorna, who hurriedly hides the brothers in a basket full of turtles from her caregiver Auntie Whispers. Auntie Whispers uses a magic bell to control Lorna and makes her work constantly lest she "become wicked"; she also darkly warns that unwelcome visitors to her cottage will be devoured. The brothers try to help Lorna escape by helping her finish her housework early. Just before they leave, Greg and his frog accidentally awaken Auntie Whispers, who warns them to stay away from Lorna or they will be "gobbled up".
While they are hiding from Auntie Whispers, a horrific demon possessing Lorna's body tries to eat them. Greg reveals that his frog has eaten Auntie Whispers' bell. Wirt uses the bell inside the frog to command the demon to leave Lorna's body and never return. Lorna, now free, decides to stay with Auntie Whispers. As a final farewell, Auntie Whispers warns them to beware of her sister Adelaide. Wirt begins to lose hope of ever leaving the Unknown, which pleases the Beast, who is watching from afar.
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.