The mirrors in Xinhai City hide eclipse spirits that feed on human emotions. In order to find his sister who was dragged into the abyss by the shadow in the mirror three years ago, college student Lin Ye accidentally awakened the power of "tracing back to the source" - he could see the remaining emotional tracks of objects, but at the cost of burning his vitality.
He was forced to get involved in the secret war between the Night Watchmen and the Eclipsed Souls. The cold-blooded Flame Echoer Su Qing, the mysterious mixed-race girl Anya, the old-school Night Watchman Zhao Changfeng... Partners and conspiracies are intertwined. The truth of the abyss is far crueler than imagined: the so-called Eclipsed Souls are just the embodiment of human negative emotions; the so-called protection actually hides an agreement to sacrifice loved ones.
When his sister's figure looms in the cracks of the abyss, Lin Ye must choose between salvation and destruction - to become the light that tears apart the darkness, or to echo with the abyss?
