When last we saw Gamache and Jean-Guy Beauvoir, his second-in-command and son-in-law, Gamache’s future in the Surete was uncertain and Jean-Guy had decided to move his family to Paris and take a security job in private industry. But in this latest outing in the Three Pines series, Gamache and Beauvoir unite for one last investigation, a missing person case which involves a young woman connected to one of his Surete agents turned into a murder case. And adding to the suspense, spring flood waters are rising, and Gamache is under attack on social media for his role in the recent opioid scandal. Haunted by the question, what would you do if your daughter’s killer went free, Gamache and Beauvoir work the case with its unexpected twists and turns.