Three best friends, all with the same birthday, are about to turn 40. They plan to share this momentous occasion together at a summerhouse in Maine, taking stock of their lives and loves, their wishes and choices. But none of them expect the gift that awaits them at the summerhouse: the chance for each of them to turn their "what might have beens" into reality.

When the world is brought to a standstill in the early days of a pandemic, Etta Wilmont finds herself suddenly stranded in Kansas City. Desperate to secure a roof over her head, Etta crosses paths with Henry Logan, a lonely older man in need of a caretaker. His invitation for Etta to stay with him seems to be the solution to both their problems—and maybe the spontaneous adventure Etta’s life has been missing. As they settle in together, Etta indulges in Henry’s library. The compelling historical accounts of life in the Midwest soon inspire vivid dreams of 1870s Kansas City.

A summer at his grandparents' South Dakota ranch is not 11-year-old Cooper Sullivan's idea of a good time. But things are a bit more bearable now that he's discovered the neighbor girl, Lil Chance, and her homemade batting cage. Even horseback riding isn't as awful as Coop thought it would be. Each year, with Coop's annual summer visit, their friendship deepens from innocent games to stolen kisses, but there is one shared experience that will forever haunt them: the terrifying discovery of a hiker's body.

Enter Elizabeth Bennet. Chef Casey Reddick has had it up to here with men. When she arrives in the charming town of Summer Hill, Virginia, she leaves behind a demanding boss at a famous D.C. restaurant and a breakup with a boyfriend jealous of her success. Some peace and quiet on the picturesque Tattwell plantation is just what she needs to start fresh. But the tranquility is broken one misty morning when she sees a gorgeous naked man on the porch of her cottage.

When two skeletons are accidentally uncovered in the quiet town, an unlikely trio is suddenly thrust together by a common goal: to solve a mystery everyone else seems eager to keep under wraps. United by a sense of justice and the desire to right old wrongs, Sara, Kate, and Jack will have to dig into Lachlan's murky past to unravel the small town's dark secrets and work to bring the awful truth to light.