When the mummified corpse of a beloved prize-winning dachshund named Coco Butternut is stolen from her final resting place, Hap Collins and Leonard Pine are hired by the owner to get her body back. The job is straightforward: they must simply exchange a bag full of cash for the missing pooch's mummy. But they can feel something's not on the up-and-up, and how right they are. With assistance from Hap's significant other, Brett, and his daughter, Chance, Hap and Leonard are soon embroiled in a gripping mystery tied to the dark secrets lurking beneath the hallowed ground of Oak Rest cemetery.