A centuries-old conspiracy is about to explode into the present and shake the art world to its core as a relentless serial killer strikes in both London and New York. The first victim was forced to swallow stones. The second was whipped to death. The third was stabbed in the heart. What did they know? Why were they in the killer's sights? Only Marshall Ziegler, the son of one the victims, can discover the dark secret of one of the world's most famous artists before the killer can strike again.