About the title
Polly Murphy arrives at a luxurious suburban home as the perfect nanny: obedient, attentive, and outwardly unremarkable. But behind her calm smile lies a shattered life — her husband, accused by patients, took his own life, and her baby was born prematurely and died; this pain turned Polly into a cold and calculating woman. Hired by Caitlin Morales, she becomes immersed in the family's daily life, gathers the smallest details, and quietly sows doubt, despair, and mistrust where comfort and safety once reigned. Gradually, the perfect nanny turns the house into a trap, where every little thing becomes an instrument of revenge.