u Qing Yun (Andy Lau) and Mu Rong Bai (Lawrence Ng) were both Wu Dang students. They were assigned to spy on Tao Yan, the so called 'evil' clan. Upon arriving there, they discovered that Tao Yan was actually a peaceful place. Moreover, Fu Qing Yun learned that he was actually the son of Tao Yan leader. This made Qing Yun hesitant on going back to Wu Dang, especially since he fell in love with Tang Qi (Angie Zhao), a girl expert in poison and medication. Unfortunately, since Tang Qi was loved by Muo--a Tao Yan hero--and Qing Yun was loved by Butterfly--Muo's sister--they decided to keep their love a secret.
