The city that looks calm on the surface is filled with gloomy energy. When a person dies, his soul is supposed to return to the underworld, but evil things such as seducing the wrong soul, retaining obsessions, and opening rifts occur frequently. The Chen family has been night watchmen for generations, using three sticks of incense to stabilize the yin and yang, suppress evil spirits and drive away evil spirits.
Nowadays, the Shouye lineage is almost cut off, and only Chen Yan is left - an intern doctor in the city's No. 1 Hospital, a half-baked successor. His girlfriend died mysteriously and tragically, and "Save Me" was written on the body in the morgue with incense ash, and the underworld chaos quietly began.
He unexpectedly gained the power of ancestral incense. The incense that attracts souls leads to the underworld, the incense that purifies evil spirits drives away evil objects, and the incense that burns heaven goes against fate and changes the situation. The price is heavy but there is no choice.
When the incense is lit, he can spy on secrets, solve mysterious cases, and put souls in peace. He faced things that others avoided, but he faced them head on.
While others are still afraid of the unknown, he has held the incense into the night and walked alone between life and death. A rift in the underworld will open, calling the underworld sect to secretly cause chaos.
Only he can burn three incense, break through the gates of the underworld, and guard the human world throughout the night.