Duncan avoids summer school for the first time, and the family goes on vacation. On their getaway, Annie and Jack are haunted by another vacation couple, while Duncan agonizes over Mia's Instagram, and Kimberly gets a glow-up.

Duncan starts racing stock cars to get away from his mom, but it turns out they make a great racing team. Jing demands a room renovation, so she can secretly spend more time with Kimberly, while Jack struggles with the project.

At the annual Witch Day Festival, Kimberly mixes up a magic witch potion that actually works, causing Jing to become possessed. Duncan and his friends enter a haunted Circuit City and Jack tries again to finally win Annie a stuffed animal at the milk bottle toss.

When Yangzi becomes addicted to his new phone, his friends stage an intervention to break him of his habit so he can experience the real world again. Meanwhile, Kimberly starts babysitting for Bradley but uncovers his mother's therapy files with secrets about many of the town's residents.