Alice meets Felix and asks if he'd travel to Rome with her. Her best friend, Eileen, is getting over a break-up and is flirting with Simon. They are still young - they desire each other, they delude each other, they get together, they break apart. Are they standing in the last lighted room before the darkness, bearing witness to something? Will they find a way to believe in a beautiful world? The new novel from the bestselling author of 'Normal People'.