The Sword Stained with Royal Blood.

Raised to be a righteous martial artist, Yuan kicks off the story proper by finding a cave containing a skeleton, a treasure map, and a manual teaching him the Golden Snake style. Obeying a request hidden in the manual to give a portion of the treasure to the Golden Snake's old girlfriend, Yuan begins to seek the woman out - on the way solving the riddle of the Golden Snake, and how he came to his end.