Dr. Black, Mr. Hyde

Dr. Henry Pryde (Bernie Casey) is a noteworthy scientist who is working on an experimental remedy for liver damage. Along with his colleague, Dr. Billie Worth (Rosalind Cash), he perfects a serum that has the potential to reverse damaged liver tissue. Pryde also donates his services as a medical practitioner to a free clinic in the Watts projects. Pryde begins a series of unorthodox experiments to test his serum, and uses the serum on himself. The results are disastrous: he transforms into a hulking white-skinned hooker-murdering lunatic. (official distributor synopsis)