Louise, a single mother, begins an affair with her new boss, David, a charismatic psychiatrist. Things grow exponentially more complex when Louise inadvertently strikes up a close friendship with David’s wife, Adele.

Pinborough builds a classic love-triangle thriller before introducing subtle, unsettling elements that pivot the genre entirely in the final fifty pages. The climax features one of the most polarizing and mind-bending final reveals in modern thriller fiction.