A priest struggles to save the life of a young woman who is possessed by the malevolent spirit of her father.

The story involves a series of murders in Charron’s performing company, murders caused by various members getting doused with vitriolic acid. Turns out all the people killed have a common denominator in their past, one which has recently re-surfaced, and is out for their blood. Will the past be uncovered before it kills again? What awful secret has came back to haunt the living?

Rock Hudson is Roger Willoughby, a renowned fishing expert, who, unbeknownst to his friends, co-workers, or boss, has never cast a line in his life. One day, he crosses paths with Abigail Paige (Paula Prentiss), a sweetly annoying girl who has just badgered his boss into signing Roger up for an annual fishing tournament.