In foggy London Dr Jekyll experiments on newly deceased women determined to discover an elixir for immortal life. Success enables his spectacular transformation into the beautiful but psychotic Sister Hyde who stalks the dark alleys of Whitechapel for young, innocent, female victims, ensuring continuation of the bloodstained research. With each transformation Sister Hyde becomes the more dominant personality, determined to eventually suppress the frail, ineffectual Dr Jekyll forever.

The Magnificent Seven Deadly Sins is a 1971 British comedy film directed and produced by Graham Stark. Its title is a conflation of The Magnificent Seven and the seven deadly sins. It comprises a sequence of seven sketches, each representing a sin and written by an array of British comedy-writing talent. The sketches are linked by animation sequences. The music score is by British jazz musician Roy Budd, cinematography by Harvey Harrison and editing by Rod Nelson-Keys and Roy Piper. It was produced by Tigon Pictures and distributed in the U.K. by Tigon Film Distributors Ltd..