Samantha Washington has dreamed of owning her own mystery bookstore for as long as she can remember. And as she prepares for the store’s grand opening, she’s also realizing another dream—penning a cozy mystery set in England between the wars. While Samantha hires employees and fills the shelves with the latest mysteries, quick-witted Lady Penelope Marsh, long-overshadowed by her beautiful sister Daphne, refuses to lose the besotted Victor Carlston to her sibling's charms. When one of Daphne's suitors is murdered in a maze, Penelope steps in to solve the labyrinthine puzzle and win Victor.
But as Samantha indulges her imagination, the unimaginable happens in real life. A shady realtor turns up dead in her backyard, and the police suspect her—after all, the owner of a mystery bookstore might know a thing or two about murder. Aided by her feisty grandmother and an enthusiastic ensemble of colorful retirees, Samantha is determined to close the case before she opens her store. But will she live to conclude her own story when the killer has a revised ending in mind for her?