Tommy Beresford and Tuppence Cowley form a partnership, hiring themselves out as ""young adventurers"". Their first case, however, is more of an adventure than they expect - working to find documents that, if they were known to the general public, would fuel a communist revolution in Britain. Dame Agatha Mary Clarissa Christie was an English crime novelist and playwright. She also wrote six romances under the name Mary Westmacott, but is best known for the detective novels and 14 short story collections she wrote under her own name, most of which revolve around the investigations of such characters as Hercule Poirot, Miss Jane Marple and Tommy and Tuppence.