The novel follows Anna McDonald, a woman whose life is turned upside down when her husband leaves her for her best friend. Seeking solace in a true-crime podcast, Anna becomes engrossed in a case involving a sunken yacht and a murdered family. As she delves deeper, she discovers connections to her own past, prompting a thrilling journey across Europe with an unlikely ally. The story weaves together themes of identity, betrayal, and the power of storytelling, as Anna confronts her own secrets while unraveling a complex mystery.