"I brought you back from the abyss to the world, but I didn't know that you were the gentle gaze of the abyss on me."
The world is eroded by strange fog, and humans establish order out of fear. Lin Gu is the best special agent of the Purification Department, codenamed "Lone Bird" - sensible and strong, but his heart is paralyzed by the trauma of childhood abandonment. During one of the most risky missions, he fell into the abyss due to the betrayal of his teammates, but was saved by an indescribable tentacled creature when he was on the verge of death.
He took the inhuman species that took the form of a black-haired boy with eyes as empty as the sea of stars home and named him Guiyuan.
