Shy and beautiful Lina (Joan Fontaine, in an Oscar-winning performance) falls head over heels for handsome gambler Johnnie (Cary Grant) -- but after the couple elopes, she begins to fear for her life when she discovers Johnnie's true nature and dark past in this Alfred Hitchcock thriller. Lina's doubts about her husband are compounded when he expresses a growing fascination with poison and a colleague of his meets an untimely death.