Drawing on the infamous Lord Lucan affair, this compelling novel explores the roots of a shocking murder from a fresh perspective and brings to vivid life an era when women's voices all too often went unheard. In the summer of 1974, Mandy River arrives in London to make a fresh start and begins working as nanny to the children of one Lady Morven. She quickly finds herself in the midst of a bitter custody battle and the house under siege: Lord Morven is having his wife watched.

According to Lady Morven, her estranged husband also has a violent streak, yet she doesn't seem the most reliable witness. Should Mandy believe her? As Mandy edges towards her tragic fate, her friend Rosemary watches from the wings - an odd girl with her own painful past and a rare gift. This time, though, she misreads the signs.