Emperor and the Swordsman

The main character is the son of a war general and a sect leader. His family hates the current Emperor and establishes a rebel group against him along with his brother. The fourth prince of the current Emperor is a wise and intelligent man with top kung fu. The sect leader's group had caused the fourth prince much trouble, and they were constant enemies.
A royal coup occurs when the Emperor's second and third sons force the eldest son to concede his throne to the second eldest son. They, in turn, attempted to deal with the fourth prince, who managed to escape. The fourth prince had always sided with the first prince and went to find help. Meanwhile, the second and third princes held the Emperor and first prince captive and took control. Will they escape, and who will take the throne?
(Source: Oocities)