When the bodies of twin brothers, both successful art dealers, are found stripped naked, necks bound with wire and legs obscenely contorted, their brutal murders are linked to the mysterious disappearance of two paintings by the master Caravaggio. Investigators are confounded and it falls to art expert Gil Eckhart to find the killer before he slays again. As the search for clues takes him from the glamorous skyline of New York to the fetid catacombs of Palermo, Sicily, Eckhart traces the horrific truth behind Caravaggio's dark and bloody secrets, bringing them to life in the present, and finds that in the high-stakes world of art, good and evil are often tarred with the same, blood-soaked, brush.