In the past three years, twelve people have disappeared and reappeared according to the precise patterns of "lunar cycle" and "city landmarks". All their memories have been cleared, and their bodies have been engraved with mysterious symbols. The police classified this as top secret, codenamed "Eclipse".
Profiler Lu Xun is the core of the task force. He had just discovered that all the missing persons had left records at the same "spiritual healing center", but the investigation was suddenly stopped internally. That night, he received an anonymous package, which contained the complete files of twelve missing persons, as well as a notice card belonging to him, marked with the next "New Moon Day".
The gears of the cycle bite the hunter himself for the first time.
Lu Xun was forced to go underground. With the remote assistance of his partner Lin Wan, he used the 72-hour countdown to change from hunter to prey. He must decipher the reason why he was "selected", and the answer is buried deep in the past he is trying to forget, and is closely connected with the paranoid philosophy of Chen Yan, the founder of the "Healing Center". When the thirteenth "new moon" rises, Lu Xun faces the ultimate choice: sink into the cycle as a perfect victim, or become the first variable to break the rules, even at the cost of uncovering the city's darkest secrets?