A group of old friends reunite for an idyllic week-long retreat. By Friday, their lives will never be the same again… In August, eight friends gather at a house in the Cambridgeshire countryside for a week-long writers' retreat. There is reading by the pool or writing in the shady corners of the garden and inside the spectacular 18th-century home.

In the evenings, there are communal drinks, dinner outdoors, midnight swimming, games. But someone is playing a game the others don't understand, meddling with their work and appearing to lurk on the edges of the retreat. As tensions rise over the seven days, desire and deceit rise to the surface and all their lives will change forever…