It’s every parent’s worst nightmare: the call that comes in the middle of the night. When Kat Jenkins awakens to the police on her doorstep, her greatest fear is realized. Her nine-year-old son, Ethan, is missing—vanished from the cabin where he’d been on an overnight field trip with his class. Shocked and distraught, Kat rushes to the campground where he was last seen. But she’s too late; the authorities have returned from their search empty-handed after losing Ethan’s trail in the mountain forest. Another mother from the school, Stef Huntington, seems like she has it all: money, prominence in the community, a popular son and a loving husband. She hardly knows Kat, except for the vicious gossip that swirls around Kat’s traumatic past. But as the police investigation unfolds, Ethan’s disappearance will have earth-shattering consequences in Stef’s own life—and the paths of these two mothers are about to cross in ways no one could have anticipated. Racing against the clock, their desperate search for answers begins—one where the greatest danger could lie behind the everyday smiles of those they trust the most.