A blood-red formula on the wall predicts the next murder.
Gu Xiang, a criminal profiler who’s just been parachuted onto the team, has to prove herself: she can “see” the path of a killer’s thoughts.
Captain Lu Mingzhou doesn’t believe her at first, until she finds the second victim’s body using nothing but a string of numbers.
But this is only the beginning.
Every crime scene bears the mysterious number “719,” and every victim is connected to a top-secret experiment from twenty years ago.
Her missing brother, Lu Mingzhou’s father, who died in the line of duty, and her own strange “synaesthesia” all point to the same name: “The Abyss.”
When she receives a warning from a mysterious person called “Lighthouse,” she realizes the killer is screening and testing people.
And she is the next target on their list.
As a meticulous serial killer, a “Guardian” lurking in the shadows, and an “Arbiter” walking the line all emerge, she must solve the ultimate crime, one that uses an entire city as an experiment, before July 19, the “Final Activation Day.”
Because this time, she isn’t hunting a killer, but the Creator hiding behind the rules.
