Just how far is a mother willing to go? When a mysterious note arrives for six months pregnant Dr Eliana Hughes, she begins to doubt every aspect of her life – from her mixed feelings about motherhood to her marriage to Martin, who has become distant in recent months. As the person behind the note escalates their campaign to out Eli’s husband as a cheat, she finds herself unable to trust even her own instincts, and as pressure builds, she makes a mistake that jeopardises her entire future. Elsewhere, someone is watching. Someone who desperately wants a baby to call their own and will go to any lengths to become a mother – and stay a mother…