I think the author making us to think that hwon is beggar.. really this story is so myster...

I think, Hwon is his childhood friend and his step brother is the beggar. I think the brother is lying. In fact, no-one died, the beggar escaped prison, but the injuried childhood friend got there instead... and now he got beaten up again by s.o. who laid their eyes on Woojin.
All of this is just my theory, I haven't seen the raws, so probably this is wrong. I'm curious to see what happens next and which storyline is true :)