The Soul of a Monster is a 1944 American horror film directed by Will Jason and starring Rose Hobart, George Macready, Jim Bannon, Jeanne Bates and Erik Rolf. The film involves the near-death of George Winson, leading to Anne Winson to call upon the devil to keep her husband alive, which leads to a hypnotist named Lilyan Gregg making an appearance as Winson recovers. Upon his recovery, the previously kind-hearted Winson turns evil, following Gregg's spell. But Ann and her friends are not susceptible to Lilyan's mesmerizing prowess, enabling them to launch a counteroffensive against the Dark Prince.