Two former students launch a dogged investigation into the cold case of Sister Catherine Cesnik, a nun who was slain in Baltimore in 1969,

Now grown, survivors describe sexual abuse at the hands of a predatory priest and how his actions may have led to Sister Catherine's murder.

In 1992, one survivor finds the strength to face the abuse she suffered and to disclose an appalling threat that frightened her into silence.

In 1994, two former students file charges against the accused priest, but they face intimidation and powerful resistance from their archdiocese.

A tip line yields compelling stories that point the group's investigation to two more men who might have been involved in Sister Catherine's murder.

As Catherine's younger sister joins the cause, the group tries to get straight answers from authorities and additional potential suspects.