March in montreal : it is a bitterly cold night and in the grounds of an old church forensic anthropologist Dr Temperance Brennan digs carefully. She is there to exhume the remains of a nun proposed for sainthood. But the body has been moved to an unmarked grave in a far corner of the cemetery. What will Tempe discover when the frozen ground finally yields to her tools ? Just hours later, Tempe is called to the scene of an horrific arson. A young family has perished and there seems to be no witness, no motive, no explanation. From the charred remains of the inferno, to a trail of sinister cult activity and a terrifying showdown during an ice storm, Tempe gathers her evidence and confronts the terror of a killer out of control.