Chen Zilang's tinnitus can accurately locate "cracks" - passages leading to other worlds. Before his death, his grandfather left behind the secret of the Night Watch bloodline. He was impoverished but had to continue his mission.
Beidao City Interpol Lin Ruoqing has been pursuing her mother's disappearance for ten years and found clues pointing to the same crack symbol. The two met because of a mysterious email and bizarre cases in two places. Lin Ruoqing used criminal investigation methods to deduce the pattern of artificial digging behind the cracks, and Chen Zilang used his gifted induction to confirm the location. They discovered that there was a traitor within the Night Watch, and Lin Ruoqing's mother was trapped in the crack to seal it ten years ago.
After the two teamed up to seal the crack in Yi Ling Street in Hong Kong Island, they received a clue from Penang reporter Chen Jiawen - she was the third bloodline of the Night Watchman. Three core cracks spell out the "source" map. The traitor tries to open the door to another world. The three must seal it before the source is completely destroyed and rescue Lin Ruoqing's mother.
Purpose: Recovering the determination of the family mission in blood inheritance; learning the courage to trust others in loneliness; the night watchman swears by blood to guard the boundary between the two worlds.
