Retired high school teacher Gwen Franklin has a new pet valet business with her BFF, and a whole new leash on life. But a killer is about to come sniffing around . . .

Gwen Franklin is looking forward to spending her retirement drinking her favorite coffee and reading mystery novels. Those peaceful plans are brought to heel by her best friend, Nora. Sporting stiletto heels, leggings, and a "more is better" makeup routine, fifty-something Nora Goldstein has a penchant for marrying—and divorcing—rich men. Now that Gwen's got free time, Nora figures they should start a dog-walking and pet-sitting service together.

But it's far from a walk in the park when the corpse of Linda Fletcher is found in Nora's kitchen. Linda was Nora's nemesis, and the large knife protruding from her chest points to murder. With no doubt that her bestie's being framed, Gwen puts her sleuthing skills—acquired from reading every Agatha Christie mystery—to the test as she digs through suspects, including four disgruntled ex-husbands, ten greedy ex-stepchildren, not to mention all her exes' exes. But with death threats and another body surfacing, can Gwen curb a killer before her own (dog) days come to an end?