In this first episode, Piers travels to Gatesville Texas to meet Erin Caffey who, at the age of 16, masterminded the brutal murder of her entire family. For this incomprehensible act, Erin will remain behind bars until she is almost 60 years old and in a gripping encounter behind bars, Piers draws from Erin what made an apparently typical teen-aged girl conspire with her boyfriend to kill her mum, dad and two younger brothers.
In this second episode, Piers meets two very different female murderers, both of whom killed someone they loved.
Piers travels to Ocala in Florida to meet Jennifer Mee, once famous across the world as the Hiccup Girl and now notorious as a murderer serving life in prison.
Piers travels to Gadsden Correctional Facility near Tallahassee in Florida where he meets Ashley Humphrey, who pumped eight bullets into a woman she had never met.
Piers travels to Bedford Hills Correctional Facility where he meets Sheila Davalloo, convicted for the murder of Anna Lisa Raymundo and the attempted murder of her own husband.
