Lu Shen, a former geological researcher of the State Oceanic Administration, awakened the echoes of the past in a deep-sea accident. Touching objects related to the abyss can retrace the historical fragments they carry. After being recruited as a special investigator by the Abyss Parliament and the International Marine Anomaly Investigation Agency (IMO-A), he must piece together the truth about the three civilization faults before mental pollution swallows his sanity: What is the original spiritual sea? Why is every civilization destroyed when it hears a whisper? And who is that being who knocks three shorts and one long in the dream waiting for to open the door?
