A mother confronts the unthinkable in this “tense, absorbing, thrilling” (The Guardian) psychological drama. When a teenage schoolgirl is murdered in a quiet coastal town, Rosie (Hermione Norris, Cold Feet) begins to suspect that her son could be involved, rupturing the relationships with her ex-husband (Paul McGann) and in her newly blended family with partner Ben (Martin Clunes, Doc Martin).