There's no such thing as a Pacific Tree Octopus, and gullible is not in the dictionary. Eight-year-old Liesel has compiled a list of wildlife to see during her family's vacation in Olympic National Park. When her know-it-all big brother discovers one of her "most wanted" creatures is a Pacific Tree Octopus, Liesel finds herself humiliated. Liesel is not one to back down. She knows there's such a thing as the Pacific Tree Octopus, and she's going to set the perfect trap to prove it.