They were six university students from Oxford, spending an idyllic week together in a French farmhouse—until they met Severine, the girl next door. But after an altercation on the last night of the holiday, Kate Channing knew that their friendships had changed, and Severine was to blame; she, however, has disappeared. A decade later, the case is reopened when Severine's body is found behind the farmhouse. Questioned along with her friends, Kate must also question her own memories of those summer nights as she tries to discover the identity of the killer.