Amid blistering personal social media attacks, Gamache sets out on a new assignment. He has been tasked with finding a missing woman, but while he leads the search for Vivienne Godin, Three Pines itself is threatened when the river breaks its banks, and a province-wide emergency is declared. As the waters rise, a body is discovered - and the victim's distraught father contemplates a murder of his own. A Chief Inspector Gamache mystery.