Lin Chen and Su Qingyue, the most inconspicuous pair in the martial arts department of Jiangcheng University - he is a "waste" with blocked martial arts veins, and she is a "mortal body" judged to have no possibility of awakening. In the end of the world when alien beasts besiege the city, they can only be reduced to the foil of high-level warriors.
Until the blood-red mist enveloped Jiangcheng, and when they were about to die, the two accidentally triggered the ancient contract. Lin Chen awakened the Chinese Dragon Vein and could use the Yangtze River water as a blade; Su Qingyue unlocked the Taiyin spiritual vein and could control the moon to deploy defenses. The former laughingstock made a counterattack overnight: he killed an A-level beast with one punch, and she froze the surface of a thousand-meter river with one sword.
As the power of the martial arts awakened, they discovered that there were dark fissures swallowing living beings hidden under Jiangcheng. Even the senior officials of the martial alliance were colluding with the strange existence in the secret realm. "Use my dragon vein as a stake, and your spiritual vein as a shield!" The two of them crushed the conspiracy side by side, from the campus trial to the banks of the Yangtze River, using the combined power of both veins to protect tens of millions of people, and finally became the strongest barrier in Jiangcheng!
