When Stuart's mom, Liz, finds out she is going on leave and can return home for a visit, the family sets out to make her homecoming a huge surprise for Stuart and Clark, but the reunion doesn't go quite as planned.

When a series of bizarre, unexplained occurrences happen in the house Ivy and Stuart wonder if their home is haunted. Excited about making some money, Stuart starts selling tickets for a "Haunted House Experience."