Elderly Nazi hunter Ezra Lieberman has made a life of seeking out the last remnants of the Third Reich. But when he investigates a lead about a mysterious plot to assassinate ninety-four seemingly unconnected men from around the world, he makes a terrifying discovery that has dire consequences for the fate of the human race. Lieberman's desperate quest to stop the unthinkable launches him on a collision course with the sinister figure behind the plot: the infamous Dr. Josef Mengele.