An ordinary suburban weekend barbecue spirals out of control in 'Truly Madly Guilty'. Clementine and Sam, alongside Clementine's oldest friend Erika, find themselves questioning the foundation of their lives after an innocent event turns catastrophic. Through shifting timelines and piercing insights, Liane Moriarty examines the complexities of friendship, marriage, and parenthood, as hidden tensions come to light. In this psychological exploration, guilt becomes a lens revealing how life's most trivial decisions can have profound consequences. A compelling portrayal of everyday existence, Moriarty unravels the ways in which unspoken truths can shape our destinies, asking the haunting question—what if the worst hadn't happened?