When Mallory receives life-shattering news, she decides to use this summer to make sure her family and friends are prepared for whatever might come.

But Mallory has a challenge when it comes to her mother, Gigi. Following the loss of her husband, Gigi is lonely. So when Mallory makes a shocking discovery that shows a new side to Gigi's relationship with her estranged sister Rose, she decides to intervene and make a last attempt to reunite them.

Returning to her mother’s quiet hometown, Mallory and her cousin Penny try to get to the bottom of a dispute that has lasted more than sixty years, involving a lost wedding dress and a heartbreaking secret. But with Rose and Gigi determined to ignore their daughters’ efforts, will Mallory be able to put her affairs in order before it’s too late?