Horror stocks a sleepy Welsh village, when a woman is butchered in Cold Blood. The grizzly evidence suggests a ritual sacrifice. Rumors and legends scatter police in all directions. Can forensic science reveal the madman behind the slaughter?
On New Year's Eve 1991, 45-year-old Catherine Carroll is stabbed 53 times and dies on the bathroom floor. Her 19-year-old son, Greg Parsons, discovers the grizzly scene and charged with murder. Neighbors testify that his mother was terrified of him. And when police uncover a song by his band called 'Kill Your Parents', Greg is eventually sentenced to life in prison. When DNA evidence finally exonerates him years later, police try to revive the stone cold case.