On this day, the world undergoes a cataclysmic change. A red sun appears in the sky, and every country except Huaxia becomes a wasteland. Monsters keep appearing along Huaxia's borders, but they seem afraid of something and never dare approach. In Huaxia, the red sun grants certain people extraordinary abilities. They form a special border force called the Huaxia Special Defense Army, code-named Demon Slayers.
The protagonist, Ye Tian, was once a powerful cultivator in the world of cultivation who had reached the ninth stage of Tribulation Crossing. After failing to ascend to immortality, a fragment of his soul fled to this world. He is reborn in the body of a man named Ye Tian. The original owner had worked himself to death delivering takeout, allowing Ye Tian to take over his body. In this life, his goal is to become an immortal.
