A cataclysm called "The Great Evernight" plunged the world into endless darkness. The terrifying monster "Shadow" breeds from the shadows, and humans can only survive in settlements driven by light.
Gu Changgeng, a scavenger struggling at the bottom of society, accidentally discovered that he could absorb the energy of shadows during a desperate scavenger hunt in order to save his seriously ill sister. This power, which he calls "the power of the abyss," gives him the ability to see in the dark and power beyond ordinary people, but it also puts him at risk of being backlashed by energy and turning into a monster at any time.
In order to survive, to protect his only relative, and to explore the truth behind Dayong Ye and the Shadow, Gu Changgeng embarked on a thorny road walking alone in the darkness. What he will face is not only a monster that chooses people to eat, but also a human heart that is even more unpredictable than the monster.
