"Thornhill" (Cary Grant) is your typically fast-talking advertising executive who is meeting some folks for a drink when he is mistaken for a "Mr. Caplan". Whisked off at gunpoint to meet "Vandamm" (James Mason) and his henchman "Leonard" (Martin Landau) his protestations of innocence just get him pumped full of booze and put behind the wheel of a car, the likely suspect of a murder investigation. He has to stay one step ahead of the pursuing police now as he tries to get his life back, a task made more difficult by his encounter with the charmingly enigmatic "Eve" (a rather static Eva Marie S...