It's midsummer and Eudora, nicknamed Dora, is staying at Sea Breeze, the family's ancestral home on Sullivan's Island. For years, Dora has played the role of the perfect wife and mother in a loveless marriage. Now her husband filed for divorce, her child is diagnosed with autism, and her house is on the market. Dora's facade collapses under the weight of her grief and she suffers "broken heart syndrome." Mamaw and the girls rally around Dora--but it's up to Dora to heal herself as she spends the summer prowling the beach, discovering the secrets of the island and her heart. This is a summer of discovery for all the women of Sea Breeze. Carson returns from Florida to face life-changing decisions, Lucille confronts a health scare, and an unexpected visitor has Harper reconsidering her life's direction.

When tropical storm winds batter the island, the women must band together and weather the tempest--both the one outside their windows and the raging sea of emotions within each of them. They must learn again what it means to be a sister. It is up to Mamaw to keep the light burning at Sea Breeze to guide the girls through the lies, the threats, and the rocky waters of indecision to home.