A look at the brutal true story of six-year-old Ellie Butler, who's own father ended her life in 2013. After a vicious custody battle between Ellie's parents and her grandparents, Ben Butler brings his child's life to an end. Neal Gray, Ellie's grandfather, and his wife took in little Ellie after her parents, Ben Butler and Jennie Gray, lost their custody when Ellie was put in hospital after being shaken as a baby. After many years, Ben somehow managed to gain custody of Ellie back, but Neal had a feeling this would end with tragedy. Britain’s Darkest Taboos tells the stories of some of the most shocking and disturbing crimes within families and relationships. Every family’s worst nightmares are relived and re-told in unflinching detail by those left behind – by the families and friends, and by others whose lives have been touched - like the police officers and reporters involved in the cases.