Gabriela is a senior negotiator in the Foreign Office. When she returns to her young family after a seven-month stint in Moscow, something doesn’t seem right. Isobel is a journalist on the local paper in Camden. After witnessing a violent attack, she starts to investigate. But someone saw her watching, and is making themselves known in increasingly frightening ways. As Gabriela’s life begins to unravel, Isobel gets closer to the truth, and the two women’s lives converge in this deeply chilling examination of deceit.