In 1893, a trail of ashen footprints leads Deputy Archie Lean to the body of a murdered thief. The man's exposed flesh has been horribly burned and occult symbols mark the nearby walls. Most troubling of all is what Lean witnessed two days earlier: this same man being lowered into his grave without a burn mark on him. Once again, the Portland, Maine, police deputy must turn to the brilliant criminalist Perceval Grey for help. Grey, a half-Abenaki Indian detective, faces problems of his own after agreeing to an elderly tycoon's death-bed plea to find his long-lost granddaughter. The dying man's family is less interested in the missing heiress than with the recent theft of an obscure heirloom carved with curious symbols. As the family's shadowy history is revealed, the three mysteries intersect to draw Lean and Grey into a maze of murder, deceit, and revenge. Each deadly new clue points toward an even greater puzzle-one that will pit Grey against a devious murderer in a race to unlock an ancient and mysterious power.