Two sisters. Best of friends. Worst of enemies. Hollie Hudson and her husband Richard are struggling to have a child, and Hollie sees her last hope in her wayward younger sister, Scarlett. Though very different from Hollie, Scarlett agrees to help, partly out of obligation and partly for reasons she has kept hidden. As Scarlett returns home from working in the Amazon, long-buried feelings and family tensions resurface, forcing both sisters to confront their past. Meanwhile, Hollie is driven to make an impossible decision in her desperate desire to become a mother—no matter the cost.