The film delves into the disturbing and twisted mind of Ed Gein, who lived in rural Wisconsin and was a quiet, seemingly harmless farmer to his neighbors. However, behind closed doors, he harbored deep-seated psychological issues stemming from his tumultuous relationship with his overbearing mother. As Ed's mother's health declined, he became increasingly isolated and delusional, leading to him committing a series of grotesque acts including grave-robbing, murder, and necrophilia.
The true horror of Ed Gein's crimes is revealed when authorities uncover his gruesome "trophies" - human body parts and skin that he used to create furniture, clothing, and masks. The film chronicles the investigation and trial that followed, as well as the public outrage and fascination with the case that continues to this day.
Through flashbacks and interviews with those who knew Ed Gein, the film explores the complex and disturbing psyche of a man whose depravity shocked the nation and influenced some of the most iconic horror films in cinematic history. It also delves into the question of nature vs. nurture and the impact of childhood trauma on the development of a serial killer.