Investigator Arkady Renko has been suspended from the Moscow prosecutor's office for smashing through the corruption of Russia's underbelly to uncover unpleasant truths. Despite this, he strives to solve a final case: a young woman is found dead in a work shed on the perimeter of Moscow's main rail hub, and Renko is the only one who recognises it to be more than the simple drug overdose of a common prostitute. The case quickly unveils itself as an entangled web of murder, money and madness that stretches from the lowest of street urchins to the powerful billionaires, uncovering the extent of corruption and fear in an emergent Russia.