Investigative reporter Heidi Blake gets a tip about the suspicious death of multi-millionaire Scot Young; together with her team, she untangles a paper trail that connects Scot to the notorious Russian oligarch, Boris Berezovsky.
Berezovsky is cast out into exile by his one time protégé, Vladimir Putin; Berezovsky flees to the UK where he befriends Scot Young and the duo hatch a plan to extract Boris' billions from Russia.
Berezovsky plots to overthrow Putin, but revolution comes at a cost; desperate for funds, Boris and Scot devise their most risky deal yet: Project Moscow; when the deal collapses, people start dying.
Heidi and her team discover gaps in the Berezovsky and Young investigations, as well as twelve other cases with links to Russia; they look to the US intelligence community for answers.
US intelligence prompts the team to investigate Kremlin involvement in the death of a Russian whistleblower in Surrey; tthe attempted murder of a Russian spy in Salisbury thrusts the investigation into the international spotlight.