For fans of The Housemaid, The Perfect Marriage, and The Girl on the Train, a twisty, psychological thriller about an invasive new friendship, a marriage full of secrets, and characters that leave readers questioning who to believe at every turn. Three people. One marriage. One murder. YOU: My handsome husband Tom. You've given me everything - our beautiful son and our perfect new seaside home. I want to trust you, but I know you haven't been honest about why you really wanted to move here. I haven't been honest with you either... ME: I make a secret promise as Tom kisses me and pours a glass of ice-cold wine to toast the first night in our dream house: I'm going to forget about his past. For the sake of our son, I'll keep this family together, no matter what. HER: Chloe is the only friend I've made since the move. I love our long lunches, even though she asks prying questions about my marriage. Tom hates me spending time with her, but I ignore his warning to stay away. I've seen the way he looks at her. It's better to keep your enemies close ... You may think you know what's going on in my marriage, but you'll be wrong. Only three things are true: Someone is a liar. Someone is in danger. Someone is a killer.