Kat Kinkaid's only son, Ethan, goes missing on a class field trip, while Stefanie Huntington's son is being threatened. As the police investigation unfolds, Ethan's disappearance has earth-shattering consequences for Stef. With the clock ticking, the desperate search for answers reveals dangers behind the everyday smiles of those they trust the most. But is the culprit an anonymous stranger or someone the women trust?