A year after the tragic death of her four-year-old son, Charlotte Fleming is sleepwalking through life, trapped in a spiral of devastating grief. Then, she sees something online that jolts her awake: her son, Sebastion, alive and well . . . in a stranger's social media post. Charlotte desperately wants to believe that what she sees is real, that her son is out there somewhere waiting to be brought home. After all, Sebastion's body was never recovered from the accident that supposedly killed him.

Annabelle Reynolds has everything she’s ever wanted. A devoted husband, two wonderful daughters, and a career she loves. She couldn’t be happier. So why is she suddenly plagued by disturbing dreams of a future where she hates her husband and her daughters’ lives are at risk? At first, she chalks the dreams up to an overactive imagination. But when details from her dreams, details she couldn’t possibly have predicted, begin to materialize, she realizes these aren’t just dreams but rather premonitions of a terrifying future.

Courtney Gray's tranquil family vacation is shattered when she hears a blood-curdling scream from the lakeside cottage next door. There she finds the lifeless bodies of her brother and sister-in-law. Her teenage niece Reese is nowhere to be found, while her nephew Wyatt lies asleep upstairs, unharmed.

Ashley Bowers is shocked by the sudden death of her sister, whom she hasn't seen or heard from in years. Grieving for the bond they once shared and wallowing in the knowledge that any chance of reconciliation is gone forever is one thing. Welcoming her sister's thirteen-year-old daughter—a girl Ashley has never even met—into the home she shares with her husband and two children is another.

Casey's cabin in the wilderness is not built for a hurricane. Her roof shakes, the lights flicker, and the tree outside her front door sways ominously in the wind. But she's a lot more worried about the girl she discovers lurking outside her kitchen window. She's young. She's alone. And she's covered in blood.