The story takes place in a modern city, hiding the ancient Taoist system and folk taboos. The two realms of Yin and Yang are not completely isolated. There is a "Yin and Yang intersection period" every hundred years. At this time, ghosts from the underworld are more likely to invade the human world. As a descendant of the Lushan Sect, Chen Xuan shoulders the responsibility of maintaining the balance of yin and yang.
