Shi Xiaoqun accidentally obtained the "Wordless Book of Heaven", a martial arts manual. The various evil sects fought over it, and was all poisoned by false copies created by Prefect Guo Wenqin. To obtain the antidote, they were forced to surrender their martial arts and correct their evil ways. These various martial arts was compiled into another martial arts manual - "Worded Book of Heaven" by Wenqin, and given to Ku'er to master it to do good. Unexpectedly, Huangfu Hui used Ku'er to avenge herself, and even set up a demon cult to kill innocent people indiscriminately. Xiaoqun mastered the martial arts in the "Wordless Book of Heaven" to stop the two from continuing to do evil.

正邪两派，情仇血恨，《无字天书》的面世掀起武林争抢大战…… 武林之中邪恶当道，石啸群自幼被自持武功高强，横行一时的海沙帮帮主欧阳以收养，但因生性善良，为人正义而受欧阳以厌恶，并被同门师兄排斥，处处受尽欺凌。但也因祸得福，被霹雳邪神收为义子，授以三招绝学，并交护身战衣和一本武林秘笈――《无字天书》，但他却悟不透其中玄机，并一时大意被邪派所得，引起了一场血腥的正邪争夺大战，天书也在争斗中遗失而下落不明…… 不久，江湖上又出现了一本《有字天书》，持有者却是石啸群自幼一起长大的挚友――身世凄苦的孤儿苦儿。而苦儿已今非昔比，不但武功盖世更是性情大变，杀人如麻，武林再次掀起腥风血雨…… 这一切都是何等因由？《有字天书》又蕴藏着什么玄机？《无字天书》又在哪里？此时已双目失明的石啸群面对着好友、爱人，又该做出如何抉择？这场武林浩劫怎样才能拯救？