Hi,

The movie was around two brothers and a powerful clan which I think was called the tiger clan, the older brother told the younger one to run and was forced to drink a potion which made him possessed. Many years later the younger brother which is now skilled fights injustice until he reaches his brother, after a fight he kills him and goes for one of the clan's masters, also I remember he turned his hair white in the last fight.
There was also a girl which travels with the younger brother and remembers how she tried to fight (I think the four dragons or something) and was saved by the older brother so now she wishes to return the favor and follows the younger brother.

That's all I remember.

Anyone?