When Lin Zixuan, an archaeological intern, was sorting out his mentor's belongings, he discovered an obsidian fragment that could not be cast by any light. The moment he touched it, an ancient whisper from the deep sea that only he could hear sounded in his ears. The policewoman Dai Nanqing, who was investigating the truth behind her father's disappearance, pointed her gun at him because the case file in her hand showed that everyone who had come into contact with similar fragments had died abnormally.
