Xiao Longnu was attacked in Hantan and was unconscious due to a strange poison.
Yang Guo searched for famous doctors all over the world, but was told that only the legendary "Nine Turns of Resurrection Grass" could solve the problem.
Sixteen years later, Yang Guo's son Yang Kang accidentally discovered that the truth about his mother's poisoning was related to Mongolian spies.
In order to save his mother, Yang Kang embarked on the road to find the antidote, but was involved in a shocking conspiracy.
Outside Xiangyang City, Mongolian cavalry pressed down on the border, and Guo Jing and Huang Rong led the troops to defend.
Can Yang Guo and his son bring back the antidote in time?
And behind the antidote, there is a secret that subverts the entire martial arts world...
