The catastic detective Sherbert M. Holmes (an orange and white long hair cat), along with his assistant and older sister Dr. Pipper (a travel-size calico cat), search for the missing catnip in their quest to identify the catnip thief, who may be a family member, an oversized yellow lab, or a kitty exchange guest. Sherbert M. Holmes and Dr. Pipper, despite their sibling rivalry, work together to catch the catnip thief and find the missing catnip. Join Sherbert and Dr. Pipper as they investigate the missing catnip before the catnip thief slips through their paws!