The trial of witch

When she woke up, she found herself sitting at the scene of a murder. Her hands were covered by blood and there was a strange body in front of her. As the victim's death was so peculiar, she was treated as a witch and was locked up in a special prison. There are only 2 days before being burnt at the stake.

However she did not have any memory of what had happened, except for two "facts", the blood and the death.
To find out the truth, she had no choice but to start the escape plan...