"The two sharpest weapons in the world,
The Rain-Ceasing Sword and the Cloud Ruling Sabre!
Carry the burdens of ethnic conflicts."
Four monks protected the Rain-Ceasing Sword, however Pong Ban, mercilessly defeated them. But there was one monk still alive who took the sword and ran away when Long Fan-Wan came to stop Pong Ban. The monk then was later found by Hon Pak, who presented it to Yin Wong.
It is set during the first Ming dynasty, after the over-thrown of the Mongolian Dynasty, Yuan dynasty. Fung Heng-Lit, the Mongol Prince, lost his childhood memory during a massacre by Emperor Zhu. Heng-Lit escaped the massacre and grew up in China. While in China, the Mongolian clan's chief, Pong Ban tries, by all means, to regain Heng-Lit's childhood memory and groom him into the Mongolian Prince. This is in the hope that Heng-Lit may lead Mongol rebel warriors into a civil war to overthrow the Ming Dynasty, whereby realizing the Mongol dream. However, Heng-Lit has his own dream of an Equal world, whereby Mongol and the Chinese live together in harmony. [Wiki]