This pitch black British comedy presents an examination of young British fellow who decided to become a professional poisoner in the early 1960's while simultaneously taking a satiric poke at British society and medicine. The film is very loosely based on a true story. Graham is a fourteen-year old genius in chemistry who must live with his appalling family consisting of his dad, wicked step-mother, and sister. Graham begins his career by slowly poisoning his step-mum with tainted sweets and altered medicine. After he offs his uncle in a similar manner, Graham is imprisoned where Dr. Zeigler, who specializes in the treatment of psychopath's, works with him. The doctor is impressed at Graham's genius and believes he can be cured. Seven years later, the supposedly cured Graham is released on parole where he immediately begins where he left off.