In 2003, Mikhail Khodorkovsky, one of the richest men in Russia, began a ten-year sentence for tax evasion. Many believed his downfall was challenging then newly elected president Vladimir Putin. During his time in a Siberian prison, Khodorkovsky became a world-famous dissident. Today, exiled in London, he continues to battle Putin’s 19-year hold on power. Exquisitely photographed in the UK, Russia and Germany, Citizen K examines power in Russia.