I remember being terrified of this when I saw it as child. "The Great Vorelli" (Bryant Haliday) is a successful, but distinctly dodgy looking, ventriloquist with his puppet "Hugo". When he meets the wealthy "Marianne" (Yvonne Romain) he sets his heart on her fortune, and to that end manages to render her comatose. Her journalist boyfriend "Mark" (William Sylvester) is suspicious and begins to investigate. These enquiries soon reveal that the entertainer's past is somewhat murky - made more so when his girlfriend "Magda" is found dead, and that's not the first corpse associated with the man.…