Two true stories of women so deranged that they murdered both their own children and those of others. One of these women is, Amelia Dyer who is considered one of the most prolific serial killers in history. Her reign of terror lasted over twenty years, as she is estimated to have killed as many as 400 children before finally being caught. There is also the case of Christina Marie Riggs who was convicted of murdering her two young children in Arkansas in 1997. Three years later, she would become the first woman executed in that state since 1845. Struggling with depression and mental health issues, Riggs succumbed to her own warped world view in a botched murder/suicide of her own children leaving an entire nation asking "why did you do it"?