"Killer Sally" delves into the tumultuous relationship between bodybuilders Sally McNeil and her husband, exploring their intense love story and the dark twists that led to tragedy. Through candid interviews with family, friends, and Sally, the narrative unfolds, revealing the complexities of their marriage and the events surrounding a shocking murder on Valentine's Day. This gripping account examines the fine line between passion and peril, offering a chilling insight into a life that spiraled out of control.