Toronto, December 1895. Detective William Murdoch takes on the most personal case of his career when his estranged father, in prison awaiting execution for murder, calls on his son to investigate the real circumstances of the case and prove his innocence. Meanwhile, Murdoch's sister, who long ago fled to a convent to escape their abusive father, is on her deathbed, and has been harbouring a secret from their childhood. As Murdoch questions those linked to the murder trial, it soon becomes clear that almost everyone had something to hide But does that mean the verdict was wrong?