A man hires a nurse to care for his ailing but nasty and shrewish sister. What he really intends to do, however, is to convince the nurse to join him in a plot to kill her.
A doctor finds a jungle laboratory, complete with mad scientist and genetic engineering experiments.
A psychopath escapes from a mental institution and starts a murder spree, which ends in the pursuing of a young handicapped girl, who once got a blood transfusion from him.