Chen Jie is a student at the Sihai Martial Arts School in Changsha, dreaming of escaping poverty through the Octagonal Cage Boxing Ring. Half a month ago, he obtained a mysterious Blood Jade Pendant, after which he is trapped every night in a gray, foggy nightmare filled with undead soldiers from an ancient era. In these dreams, he fights and defeats spectral warriors, and upon waking, discovers he has inherited their combat memories and techniques.

The first is Xingyi Cannon Fist, a devastating explosive martial art that transforms his punches into cannon-like strikes. As Chen Jie balances brutal real-world training with nightly spectral battles, he begins walking the path of national martial arts, uncovering secrets behind the pendant and the fallen Xingyi Sect while striving to become a true grandmaster.