Quand Thomas Lang, un tueur à gages au cœur tendre, est engagé pour éliminer un industriel américain, il décide en fait de plutôt le prévenir du danger qui le menace. Une bonne action qui ne restera pas impunie...

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.