I don't know the title or any of the cast members. I just remember bits and pieces of the plot. (I watched this sooooo long ago. Probably when I was around 14 or so, lol. Ahem, way over a decade for me.) Please bare with me. I don't know any names from the series.
There's a... I guess, famous man in the martial arts world, and he has a son, a daughter and an adopted son (who's actually played by an actress, for the purpose of later story plot). His adopted son is more reliable and better than his real son, who gets jealous and angry at his father and neglects his family and responsibilities. I think he fades out of the story for a bit.
The adopted son is in love with the sister, who only sees him as a brother. He later rapes her, but I don't remember the reason why. The father finds out that his daughter was rape and aborted the pregnacy, and locks her away in some place, out of shame. She doesn't know who raped her till later. (Oh I think the daughter's name is Thieu Diep.. lol, I only remembered it 'cause it was a pretty name. =P)
The daughter meets this young wanderer. I labeled the guy that 'cause I can't remember his background at all! lol. =( She actually was going to kill herself by drowning in the lake, but he was riding by in a small boat and saw her, so he saved her. (Aaah they are the reason I really want to find this series and watch it.) He later ends up working in her father's clan, and they spend time together and fall in love. The adopted son's true character gets revealed, and maybe his plot exposed.. not sure what exactly. But he gets kicked out of clan.. this is the weird part I remember: that adopted son confides in some man, who secretly puts some potion into the wine for the guy to drink. The potion slowly turns the adopted son.. into a woman. @_@;; Yes, I thought that was soooo weird, but I ignored it for the romance of the daughter. =P
So that adopted son becomes a woman, and the last half of the series, comes back to seek revenge on that family. I don't even remember how it all ended. So if someone could help me out with the series title and some of the cast members, I'll be so happy! I've been searching for a year now, and you guys are my last hope! Thanks, and sorry it's so long.