As the McKenna family struggles to express their feelings about the loss of Patrick, Uncle Terry, Patrick's twin brother, reappears in their lives. The boys are given The Dangerous Book for Boys, and Wyatt soon finds himself caught up in vivid fantasies inspired by it, and must navigate both a mission to the moon and his family's emotions.

With both his mom and his teachers concerned about him, Wyatt is sent to a therapist, where he struggles with the idea that he might be crazy. Meanwhile, Beth tries to keep the family's spirits up at all costs, and Liam, to Dash's delight, finds himself under a troublesome hex.