World-famous detective Hercule Poirot, accompanied by Captain Hastings, his intrepid friend and colleague, solves two baffling mysteries, one involving a rare diamond and the other centering on a curious death at a manor house. Adapted from the Agatha Christie short stories “The Adventure of the Western Star” and “The Tragedy of Marsdon Manor,” Agatha Christie’s Diamonds and Death is a smart, stylish, and suspenseful mystery double feature.