Iconic Moscow investigator Arkady Renko hasn’t seen his part-time lover, journalist Tatiana Petrovna, since she left on assignment over a month ago. Renko slowly learns that Tatiana has been profiling the rise of political dissident Mikhail Kuznetsov, a golden boy of modern oil wealth and the first to pose a true threat to Putin’s rule in over a decade. Though Kuznetsov seems like the perfect candidate to take on the corruption in Russian politics, his reputation becomes clouded when Boris Benz, his business partner and best friend, turns up dead. In a land of shamans and brutally cold nights, oligarchs wealthy on northern oil, and sea monsters that are said to prowl the deepest lake in the world, Renko needs all his wits about him to get Tatiana out alive.