Grace Winter, 22, is both a newlywed and a widow. She is also on trial for her life. In the summer of 1914, the elegant ocean liner carrying Grace and her husband Henry across the Atlantic suffers a mysterious explosion. Setting aside his own safety, Henry secures Grace a place in a lifeboat, which the survivors quickly realize has exceeded capacity. For any to live, some must die. As the castaways battle the elements and each other, Grace recollects the unorthodox way she and Henry met, and the new life of privilege she thought she'd found. Will she pay any price to keep it?