It’s the holidays, and photographer Brooklyn Locke is bound for Italy with her husband, Trey, and their two children. But when Trey vanishes from the airport, missing their connecting flight, their impromptu vacation --- and life as she knows it --- begins to unravel. Desperate to find her husband, Brooklyn accepts help from a stranger on the same flight, Eden Barrow. But Eden soon makes a shocking claim. She is the sister of Trey’s first wife, and 10 years ago he was the main suspect in her murder. Struggling to comprehend these accusations, fate delivers one more blow: a violent accident that leaves Brooklyn fighting for her life. With nowhere else to turn, Brooklyn leans on Eden for support. But each kindness feels too rehearsed, feeding her doubts about Eden’s motives and Trey’s true past.