In 1979 Fall River, MA, home to the notorious Lizzie Borden, two young women are killed in a series of brutal murders. Police discover a satanic cult is practicing human sacrifice, led by cult leader, a man named Carl Drew.

Satan takes a prominent role in the bizarre 1981 trial of Carl Drew, as the "Satanic Panic" incites fear across the country. Carl's claims of innocence are overlooked, leading to a shocking injustice. The lead detective in the case becomes so haunted by his own investigation that he pledges to undue Carl's conviction. After a six year hunt for new evidence, he uncovers a shocking truth.

Through a prison interview, Robin Murphy's harrowing account brings everything into question. Her story paints a picture of corruption and neglect that reveals a truth never before considered. An additional murder is revealed, previously thought to be unconnected to the case, that may put the puzzle together.

While Carl Drew appeals his case, a new witness is discovered who describes one of the murders. Filmmakers return to meet with Robin Murphy a final time. After compiling all the evidence a new possibility is presented that turns the case on its head. As the pandemic disrupts the documentary, filmmakers take their findings to an innocence program.