As sheriff's-deputy-turned-pet-sitter Dixie Hemingway and an adorable dachshund named Mame are out for a morning walk, a car speeds by and Dixie waves to the driver. Later, after the dachshund discovers a dead body, Dixie realized that she has waved to a killer. And since the killer mistakenly believes that Dixie can identify him (or her), the chase is on.

Dixie Hemingway discovers the dead body of the gatekeeper of a mansion. She's had her fill of homicide investigations, so she leaves the corpse to be found by somebody else. But that somebody else sees Dixie leaving the scene of the crime, and the bullet that killed the man could have come from a gun she owns. To make matters worse, the owner of the mansion is a new client---a pain-wracked scientist who is either quite insane or a genius whose clandestine...