Basically Byron's dad is a r*pist and he preyed on the people attending sermons on his house. Byron saw a (college?) student Anders limping and Anders sent Byron a picture of the things happened between him and his father (as a revenge, i think?). Byron realized this, and get out of the town. Few years after that he come back to investigate by visiting Anders' dorm room at Highwell Uni. (No idea what happened to the real Anders meanwhile and why Byron just suddenly impersonating him though)