Mary MacIntosh, a former prosecutor turned FBI consultant, teams up with an FBI profiler to track down the notorious "Tooth Fairy Killer." As they delve deeper into the investigation, the case takes a chilling turn when evidence reveals that the killer is fixated on Mary, embedding her likeness into the cryptic ciphers he leaves behind after each gruesome murder. This relentless serial killer doesn't just target individuals; he stalks entire families, leaving behind infamous bite marks, shattered mirrors, and staged corpses that send shockwaves through the community.

As Mac and her partner work to connect the legal and psychological dots of these horrific crimes, they uncover a dark profile of the killer: a man likely scarred by a cleft lip and crooked teeth, who suffered abuse and neglect in childhood, harboring deep-seated hatred towards his mother. Drawing inspiration from the chilling true crime case of 1981, this killer has even consulted with the infamous Hannibal Lecter for insights into his own twisted motivations.

Obsessed with the painting The Great Red Dragon and The Woman Clothed in Sun, the Tooth Fairy Killer's story unfolds in a fast-paced, page-turning thriller that blurs the lines between obsession and madness.