In an early career appearance, Jack Nicholson stars as Lieutenant Duvalier, a nineteenth century military officer whose dreams are haunted by a mysterious beauty (Spencer Knight). Those same dreams draw him to the sinister castle of Baron Von Leppe (Boris Karloff), but is it really the Baron or an imposter? Before he knows it, he finds himself a prisoner and frantically tries to solve the mysteries that surround him. Director Roger Corman collaborated with other directors, including Francis Ford Coppola, in the filming of this horror classic.