Dark forces are at play. Ivy comes from director Sam Wood, with a screenplay by Charles Bennett based on Marie Belloc Lowndes’s novel The Story of Ivy. It features Joan Fontaine, Patric Knowles, Herbert Marshall, Richard Ney, Cedric Hardwicke, and Lucile Watson. Daniele Amfitheatrof composed the music, and Russell Metty was in charge of cinematography. Ivy Lexton (Fontaine) desires riches, and to get them, she …