Zhan Meng-bai's father is assassinated by a mysterious archer, and his love interest is killed by the same assassin. Determined to avenge them both and discover the archer's secret, Meng-bai meets his supposedly deceased mother and many other renowned martial artists. Meanwhile, he falls in love with the daughter of the leader of the Emperor's Valley. Eventually, Meng-bai learns the identity of the archer and learns that the archer intends to die in battle with him.
St. Lawrence College, an all-girls school, breaks tradition by admitting three male students, including Wen Shu-sen. They become classmates with Wong Yuk-chu and Tong Ka-tai, initially experiencing teasing but eventually fitting in. The young people enjoy spending time together, playing pranks on their teachers and principal for fun, but a small incident tests their friendships and romances.
Lam Sai Wing (Lo Hoi Pang) was an apprentice of the legendary Master Wong Fei Hung. Because he had killed too many during his lifetime, he was delayed from reincarnation, and his soul was somehow trapped inside a high school. A group of wealthy students, Chui Man Kin (Edward Mok), Sze Chun Nam (Sunny Chan), and Tsang Chi Sing (Cheung Kam Ching) were upset about the greedy behaviors of the school mistress, Liu Wai Chu, and the disciplinary counselor, Au Yeung Hip Sing. The students played tricks upon them, and accidentally led them to death. Seizing this opportunity, Wing returned to life after entering into the teacher's body. Without any experience as a teacher, Wing created a lot of trouble, and made the entire school livelier. As the school atmosphere improved, Hip Sing's soul returned and demanded to return into his own body.
The further adventures of Wang Wuji, Liu Xian'er, and Drunken Babe, after the defeat of Lian Bixie and Little Sword Immortal in the previous series. New threats arise in the form of two rivaling evil sect leaders, the Sun Emperor and the Moon Empress.
Wang Wuji, Liu Xian'er and Drunken Babe accidentally got involved in the struggles between them. Xian'er was even killed by the Moon Queen. Wuji cooperated with the Sun Emperor for revenge, but was betrayed by him. Later, the Sun Emperor and Moon Empress settled their differences. The two mastered supreme kung-fu and wanted to dominate the world. Wuji and the others decided to fight to prevent the catastrophe in the martial arts world.