After losing his life savings to Russian hackers, Mickey Summer wants compensation. Or revenge. Ideally both. With British authorities dragging their feet, Mickey decides heíll do it his way and is soon enmeshed in the tangled web of Russian state, mafia and business. Declan Lehane heads a US task force fighting a Kremlin-sponsored hybrid war. Their investigations overlap in St Petersburg, and in the process they uncover the Russian presidentís darkest secret. But with his finger on the nuclear button, dare they reveal it?