At a swim meet in their quiet New England town, Annie watches as her daughters glide through the water. Her thoughts drift lazily from whether she fed her daughters enough carbs that morning to why her husband doesn't kiss her anymore, to Paul, a swim-team parent, who's taken notice of her and seems to embody everything she's beginning to think her life is missing.
When a girl on the team is murdered at a nearby highway rest stop—the same spot where Paul made a gruesome discovery years ago—Annie and her fellow swim-parents find themselves adrift. With a serial killer too close for comfort, they must make choices about where their loyalties lie. And as a series of shocking events unfolds, Annie must discover what it means to follow her intuition—even if love, as well as lives, could be lost.