Exploring the life and convictions of Joanne Dennehy. After serving a short sentence in Peterborough prison, she committed a frenzied knife attack on a man she lured back to her apartment with the promise of sex. Whilst on the run from police, Dennehy proceeded to violently stab and murder two more men over the next 10 days, before stabbing two men out walking their dogs.

Following the crimes of Jaime Osuna, such as the metal and physical abuse he inflicted on his ex-wife, as well as the torture and murder of a mother of six who resembled his ex-partner. Awaiting trial, he began practicing Satanism and attempted to kill a fellow inmate.