Three shocking cases in the UK, where women have been convicted of the murder or manslaughter of the men in their lives. Told through those closest to the cases including families, police, journalists and experts, this documentary explores the psychological and behavioural issues that has driven these women to take a life.

Transgender woman Naomi Hersi met Jesse McDonald on a dating website, but he claimed to have been drugged by her, which led to a fight. Then Jesse stabbed Naomi, left her body in the bathroom, and enlisted his 17-year-old girlfriend to help clean up the crime scene.

Molly's relationship with Josh Stimpson started well but then turned into a campaign of abuse and stalking. Eventually he stabbed her 75 times in broad daylight.