The Old Dark House style mystery thriller gets an affectionately murky makeover in director Jack McHenry’s Agatha Christie-meets-Lucio Fulci feature debut. In stunning Black & White, with cut-glass British accents and a dodgy American in the cocktail party mix, a sophisticated 1930s soiree at an isolated country mansion descends into carnage, gore and demonic possession as rivalries and old friendships are put to the test when a gateway to Hell opens up.

When Allied forces liberated the Nazi concentration camps in 1944-45, their terrible discoveries were recorded by army and newsreel cameramen, revealing for the first time the full horror of what had happened. Making use of British, Soviet and American footage, the Ministry of Information’s Sidney Bernstein (later founder of Granada Television) aimed to create a documentary that would provide lasting, undeniable evidence of the Nazis’ unspeakable crimes. He commissioned a wealth of British talent, including editor Stewart McAllister, writer and future cabinet minister Richard Crossman – and, as treatment advisor, his friend Alfred Hitchcock. Yet, despite initial support from the British and US Governments, the film was shelved, and only now, 70 years on, has it been restored and completed by Imperial War Museums under its original title “German Concentration Camps Factual Survey”.

Thriller charting the moral collapse of a police family. Two cop brothers, smothered by the shadow of their former police chief father, must investigate a crime they themselves have committed.