Alex Bartal is the Director of the Mossad's Operations division. Hardly an easy job on a good day, but he has no idea how harrowing the next week of his life will be. One of Bartal's agents is on a mission to kidnap an Iranian general, interrogate him, and, finally, kill him. Then the plan goes terribly wrong. The agent is captured instead-generating a series of escalating crises in Europe and Asia, which results in the deaths, one member at a time, of the Ring of the Nibelungs, a sleeper cell network of Mossad agents. Convinced that there is a traitor within the Mossad, Bartal must race to identify and eliminate the mole. His first hunch leads him to Berlin, but as his investigation evolves, Bartal is forced to confront Europe's dark, troubled history. Is he chasing an elusive ghost across the Continent? Or is he closing in on a ruthless, killer who refuses to let go of the past?