Based on the novel 'Post Mortem: The Story of Katyn' by Andrzej Mularczyk this film tells the horrific story of the 1940 Soviet NKVD's massacre, and subsequent cover-up, of an estimated 22,000, mainly Polish, military officers, police and intellectuals. Rarely does a film about the horrors of organised genocide achieve in its representation such an honest and harrowing account of crimes against humanity.