Under the prosperous city "Lanzhou", sleeps the ancient barrier that connects Yin and Yang. It is the last barrier to resist the evil spirits of the other world, and the position of "Guardian of the Nation" who protects the barrier has been vacant for hundreds of years. Qin Fei, a young man who runs an antique restoration shop in the old town of Lanzhou, looks ordinary, but in fact he is a direct descendant of the last door god who ruled the country a hundred years ago, with sealed divine power and memory sleeping in his body.
A sudden "ghost rain" broke the peace of the city. In the rainy night, invisible shadows wandered in the streets. People disappeared one after another, leaving only strange scorch marks and a strong gloomy atmosphere. While repairing an ancient mirror, Qin Fei accidentally triggered the mark in his blood and was forced to be involved in this crisis. From the initial confusion and resistance to his own power, to seeing his relatives and friends in danger, he gradually awakened the sleeping fragments of his godhead.
Under the guidance of the mysterious old man "Guardian", Qin Fei learned the fate of his family and the secret of Lanzhou's barrier - those black shadows were alien creatures from the "Abyss", and they were trying to tear apart the barrier. Holding the Spirit-Suppressing Ruler left by their ancestors, Qin Fei was struggling between his identity as an antique shop owner and his mission as the gatekeeper of the country while dealing with the creatures of the Abyss. Not only does he have to fight against increasingly powerful alien monsters, but he also has to be wary of apostates lurking in the city - humans who collude with Youyuan in pursuit of power.
From the deep alleys in the old city to the invisible junctions between skyscrapers, face the minions of the abyss, use the power of your blood to protect the city's day and night, and continue to write the family's guardian legend that spans a century.
