February 3rd, 1880. Lucan, Ontario. A horrific plot is about to be executed on this brutally cold night. Using darkness to conceal their movements, a secret society made up of locals converges on the Donnelly homestead. Many are disguised to conceal their identities. In a savage attack, all four family members at home are cruelly bludgeoned to death, their bodies left to be discovered amongst the smoldering remains of the farmhouse. The mob then continues to another Donnelly farm where in cold blood they shoot and kill yet another member of the family.
In the ensuing investigation, two eyewitnesses to this massacre testify in two of the most sensational trials in Canadian history. However, no one is ever found guilty and there are no convictions made. A mass murder occurred, the people involved were arrested, the evidence against them was overwhelming, and yet they walked free. How could this have happened?