Jeffrey's friend Ben brings his garter snake to school for a report, and the class likes it so much that their teacher agrees to have a  “pet day,” when all the children can bring their pets to class. The only problem is that Jeffrey doesn't have a pet—at least not yet.
When Jeffrey finally talks his mom into going pet shopping, he realizes he has another problem. His friend Max, the ghost, has come along, and the minute they walk into the pet store some of the animals go crazy. Jeffrey really wants a dog or a cat, but they're all terrified of Max. Will he be forced to choose between a pet and a ghost?