On the surface, Anna Witherall has the perfect life. Married to her university boyfriend David, she has an enviable job, beautiful home, and gorgeous three-year-old twin daughters, Stella and Rose. Their competent and capable nanny, Maria, is practically part of the family. But beneath the veneer of success and happiness, Anna is hiding a dark secret, one that threatens to unravel everything she has worked so hard to create. Only one thing is certain: to protect her children, she must betray them.