In Algonquin Bay, Detective John Cardinal suffers a devastating loss. He arrives at a grisly crime scene only to discover that the victim is his own wife, who left a suicide note at the scene. But when Cardinal begins to receive a series of threatening letters, he suspects that his wife may not have taken her own life—and that there may be more to her suicide note than meets the eye.

While Cardinal takes time to grieve, his partner, Sargeant Lise Delorme, is investigating a high-profile sex crime involving a young girl whose abuse is being broadcast online—and who appears to be a resident of Algonquin Bay. Things are heating up in this quiet, costal town as both Delorme and Cardinal find themselves tracking predators so diabolical that the accepted bounds of criminal justice no longer apply….