A remote Scottish hunting lodge becomes the scene of a murder during a New Year's celebration among old friends. A group of former university friends, now in their thirties, gather at a luxurious, isolated lodge for a New Year's trip. Tensions simmer beneath the surface as old resentments, secrets, and unspoken rivalries emerge, exacerbated by the isolation and the festive atmosphere. When one of them is found dead, the remaining guests must confront the possibility that the killer is one of their own.

This novel has been widely recognized as a compelling mystery, with critics frequently highlighting its clever plotting and atmospheric setting. The use of multiple narrators is often cited as a strength, allowing for a nuanced exploration of the characters' secrets and motivations. Readers have praised its ability to maintain suspense and deliver a satisfying twist. The book's success is evident in its status as a Sunday Times No. 1 Bestseller, indicating strong public reception.