The Des Moines Playhouse presents Agatha Christie’s The Mousetrap Feb. 6-Mar. 1. A snowstorm strands seven strangers at Monkswell Manor. It soon becomes clear there is a killer among them, and each of the guests is both suspect and sleuth. They must uncover the murderer before one of them becomes the next victim. From the Queen of Mystery, Agatha Christie, The Mousetrap is the world’s longest-running play.