Stella Widstrand is a psychotherapist and a happily married mother to a 13-year-old son. But when a young woman named Isabelle steps into her clinic to begin therapy, Stella's placid life begins to crumble. She is convinced that Isabelle is her daughter, Alice --- the baby who tragically disappeared more than 20 years ago on a beach during a family vacation. Stella has always believed that Alice is alive, somewhere, but everyone around her worries she's delusional. Could this be Alice? Stella will risk everything to answer that question, but in doing so she will set in motion a sequence of events beyond her control, endangering herself and everyone she loves.