Ashley and his production company Four Associates Ltd. put up the money to produce the film themselves in the Philippines, and instead of allowing Lynn to distribute it, he made a deal with Roger Corman's then-fledgling New World Pictures instead.

Inhabiting the body of Phillip Rogers and with his face, Langdon tries to exert his own free will, but becomes a hairy, murderous beast — a werewolf on the rampage — and kills several people.

His wife Julia (Mary Wilcox) tries to support and comfort him during the day, as does his brother Earl (Ken Metcalfe), but when he meets blind former bandit Sabasas Nan (Andres Centenera), he starts to find the strength to fight back.

When a gravely wounded Sabasas Nan asks Rogers to pray for him, he does so, and at that moment, he is shot by Lt. Campos, dies and reverts to his true age, his soul now free.

"[7] Diabolique magazine wrote that "The film is a lot of fun, and Ashley's performance is good – he's not playing a stock leading man character this time, but a tormented killer redeemed by love for his new wife.

Linda Gross of the Los Angeles Times called it a "confusing, implausible rather poorly made horror film", although she admitted it had "a nice twist" showing "two kinds of caring: that of a woman whose love implies expectations and that of a friend who wants nothing and is thereby able to give more.

[11] In 2014, Michael J. Nelson, Kevin Murphy and Bill Corbett of movie mocking commentary RiffTrax riffed the film as part of their repertoire.