Birdie Cousins has planned a getaway with her daughter Chess on rustic, charming Tuckernuck Island, a chance to bond before Chess's upcoming marriage. Then Chess abruptly breaks off the wedding and her fiancé shockingly dies in a rock climbing accident, leaving Chess feeling guilty and deeply depressed. Birdie circles the wagons, convincing her younger daughter and her own sister to join them on Tuckernuck for the month of July. Secrets and intrigue soon make their way to the surface.