Chris and Shannan Watts were by all accounts the perfect couple, with two perfect children Celeste and Bella. In 2018 this family was shattered by the disappearance and murder of Shanann and the kids at the hands of Chris himself. How is it possible for something this horrific to happen in a sleepy mountain town of Frederick Colorado? Did Chris simply snap the morning of the murders, or was it something much more calculated and sinister? Friends of the Watts family come together to unravel the secrets behind this tragedy.