Years ago at university, Celia’s boyfriend turned on her in a horrifying way—joining with his friends to sexually assault her during a party. Celia didn’t go to the police. She told no one except her best friend, Lily. She just wanted to move on with her life. Now, her settled life with her beloved husband and daughter has been disrupted when one of her assailants is found dead. Celia can’t help but wonder if the friend she confided in—who’s gone on to become a private investigator—could be capable of murder. So she decides to search for answers. But her pursuit takes her down a path Celia never expected—and raises an even more terrifying question: Is she capable of murder herself?