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When seven members of his family were kidnapped by the Vesper, thirteen-year-old Dan Cahill knew he would be fighting for their lives. He also knew that he would be facing an extremely powerful enemy. And Dan also knew that some of his family members would not survive. But even though Dan was forced to accept these facts, something happened that he could not accept. The Vesper had kidnapped Atticus, Dan's best friend. And now Dan has to save Atticus, who is on the verge of death. The thrilling adventure continues in the alleys of Prague and the caves of Turkey. But Dan better hurry up and find Atticus. If he doesn't find him, his best friend will die.