Lurking beneath the progressive activism and sex positivity in the 1970 to '80s, a dark undercurrent of violence rippled across the American landscape. With reported cases of sexual assault and homicide on the rise, the FBI created a specialized team - the “Mindhunters”, better known as the Behavioral Science Unit - to track down the country's most dangerous criminals. And yet narrowing down a seemingly infinite list of potential suspects seemed daunting at best and impossible at worst - until Dr. Ann Wolbert Burgess stepped on the scene.

On February 1, 1910, the vivacious, diamond-adorned music hall performer Belle Elmore suddenly vanished from her home, causing alarm among her friends, the entertainers of the Music Hall Ladies’ Guild. Their demands for an investigation would lead to the unearthing of a gruesome secret and trigger a fevered international manhunt for Belle’s husband, medical fraudster Dr. Hawley Harvey Crippen.

Fewer than twelve hours after her body was found and without any evidence, police decided a married couple from Denver had killed her. Within a few days, they arrested and charged Nancy Styler, a friend of Pfister's who'd had a falling out with her after a business deal went sour, and Dr. Trey Styler, Nancy's disabled husband, who recently lost the family home, his medical practice, and any hope of a peaceful retirement for himself and his wife. Eleven days later, police also arrested and charged Kathy Carpenter, Pfister's underpaid and overworked personal assistant and closest friend.

At sixteen years old, Lily Arthur was caught between the women's liberation movement of the ‘swinging sixties and the draconian ideology that young women should be punished for deviating from society's 'moral codes'. For the 'crime' of being pregnant, Lily was forcibly taken from the man she planned to marry and incarcerated in the notorious Holy Cross Home for ‘wayward' girls in Wooloowin, Brisbane as a ‘prisoner' of the state. Lily spent her entire pregnancy performing unpaid labour its infamous Magdalene Laundry.

Sonia Orchard was in her forties when she told a therapist about the boyfriend she had when she was fifteen. Sure, he had been a decade older than her, but it was consensual ... wasn't it? To her surprise, Sonia broke down in tears, then began to shake uncontrollably–an unmistakable expression of trauma that lasted for days. She was clearly not okay, but could the relationship she'd thought was love really have been abuse? Had she been groomed?