Anyone know the name of this Korean drama?

I was wondering if anyone here knows the title of a Korean Drama show I saw on tv before. I didn't really watch it so I don't know much about it but it was a business-related show about a rich family. One thing I remembered was that the show constantly had this dramatic, orchestra music playing. It kind of focused on the son who seemed like he was a kind of bad guy and there was always scenes with the sister (who had short hair) sitting in their house lobby area looking smug.
Spoiler:
[spoiler]In the final episode, the son commits suicide- it shows him walking toward some water- instead of going to jail and the sister cries in some scene toward the end. I was wondering if anyone saw this show before and know the title. Thanks.[/spoiler]
Sorry I don't really know much else about this show..

Thanks for the reply. I actually watched Mask before. It isn't the one I'm thinking of.
It was more business related. The son was the head of a company and didn't get along with his father or something. He was kind of like a bad guy the entire show even though he was one of the main characters.