Dark Tracing

In the smog-shrouded central city, a series of gruesome murders occurred one after another. Li Yi, an elite criminal police officer of the Central City Crime Team, has a unique trait - congenital total color blindness. In his world, there are only three colors: black, white and gray. This flaw gave him extraordinary powers of observation, allowing him to see details that ordinary people ignore. When the serial killer who calls himself an "artist" sets his sights on Li Yi, a cat-and-mouse game officially begins. Lina, a former psychology professor and now a private detective, has the gift of insight into people's minds. As the only survivor of a serial killer, she has an almost pathological understanding of abnormal psychology. When she is called in to assist in the investigation, Li Yi is both dependent on and wary of her.