This Taiwanese police procedural is a dull, lifeless film that simply goes through the motions without reaching any discernible high points.
It begins with the usual hook for this genre: a serial killer makes life hard for a depressed detective, who has to come to terms with herself while chasing the madman with the help of her rookie colleague. That would be fine if the plot presented at least a few fresh ingredients throughout the runtime, but it just settles into a predictable rut and never manages to lift above it.
I can't quite say this is a terrible film since it is competently shot and acted well enough, I guess. But the writing is unexceptional, and even pretty weak at times, given that a few scenes come across as comical when they were obviously meant to be serious. Absolutely no surprises or interesting character work are at store for the viewer, and I believe that won't cut it for many genre fans.
It is available on Netflix for anyone interested, but I wouldn't recommend it.