Ervin Plummer-played by the estimable George Macready, who like his good friend Vincent Price was a man of culture and erudition who specialised in bad guy roles-is a grasping avaricious businessman with a hunger for gold.

Angered that her sister Celia has stolen her fiance, Dell Faring kills her and allows Celia's husband David, knocked out in an argument with Celia, to take the blame and end up on death row. Later Dell, finding out that David's young daughter Susan was witness to the crime and is undergoing psychiatric treatment, plans to eliminate her before her memory returns.