The Mask of the Murderer's Daughter

After a family of twelve was murdered, many theories of who the killer was rose up. As the real killer learned that he was highly suspected he got an idea. He knew that this idea was was a plan that would result in the death of his own daughter, but he was willing to do anything to save his own life. The only hope for this young girl appears when a masked lady shows up and tells her to trust her. What would you do if everyone you knew was against you, and a strange stranger was the only one who could help you?