How well can you ever really know your sister...? Golden boy Griffin Tomlin is found dead, floating in his pool, the morning after his family's Labor Day party, and neighbor Emily Porterfield is arrested for his murder. No one knows why she killed him, except for her younger sister, Clara. The secrets behind What Happened That Night unravel in dual timelines: In the present, Clara struggles with the aftermath of the murder--questions and distrust from her friends, denial from her parents, and visits to her sister in jail. And amidst all of that, another body is discovered that could be connected. In flashback, the events that brought Clara, Griffin, and Emily together and that led to his death are revealed--events that involve a crush, an obsession, and a shocking twist.
