Chateau is a granddaughter of some high ranking guy?? And her father is a rebellious son and ran away with her
And Donny is the one who tried to kill her father and somehow Sunwoo is involved with this too
No, I think Sunwoo was acting on his own. He's just a gangster. Her father was probably in debt to him or something.
Donny, on the other hand, is just trying to return the daughter to her grandfather.
Grandfather is running some sort of conspiracy, though so he's not much better than a gangster himself.