A gripping documentary that uncovers the truth behind one of Russia's most enduring unsolved mysteries, "An Unknown Compelling Force" delves into the Dyatlov Pass Incident, a haunting tale of nine Soviet hikers who left their tents in the freezing cold without adequate attire, with tragic consequences. British-American documentarian Liam Le Guillou travels to the Ural Mountains, where he interviews locals and examines the best theories behind this bizarre event, shedding light on the victims and providing a thought-provoking exploration of the case's complexities.