THE LUNEFABLE REVIEW
Diary of a Criminal Investigator
Diary of a Criminal Investigator review: the photograph is worth another look
Lu Chuan's supernatural advantage makes a spectacular entrance at a wedding. His more interesting test comes afterwards, with a camera, a tired mentor and hundreds of photographs that still need examining.
THE SHORT TAKE
A brisk police progression fantasy that becomes most engaging when spectacular recognition gives way to patient technical work and the small loyalties of a four-person office.
The reception is a difficult place to remain professional
Lu Chuan's new life begins amid a wedding party he has little reason to enjoy. The bride is his roommate's recent ex-girlfriend, and the groom appears determined to turn the young men's attendance into a public humiliation. Money is thrown about, tempers rise and somebody has a phone ready to record the response. The immediate danger is not a criminal mastermind's weapon. It is a friend doing something angry enough to destroy his own newly beginning career.
Lu's decision to restrain that friend gives the confrontation a workable stake beneath the extravagant insults. The scene is plainly designed to deliver a reversal, and its treatment of the bride is broad and ugly. Even so, the pressure of needing to act without surrendering to provocation is effective. These men have uniforms, expectations and families counting on them; an impulsive punch could cost more than a bruised face.
An extraordinary eye still needs something to see
The system arrives with a matching ability and a practical photography skill. The first supplies an urgent possibility in a room full of people. Its percentages compare traits rather than simply announcing an indisputable identity, and the opening initially distinguishes an alarming resemblance from confirmation. Lu must notice reactions and seek a physical detail before the situation can move beyond suspicion. I would leave the wedding's exact turn to the chapter itself.
The device is generous enough to make that sequence feel like wish fulfilment, but its limits matter to what follows. Recognising an already wanted person is a different task from reconstructing a death whose circumstances remain uncertain. The novel's stronger interest emerges when Lu has no convenient face to scan. His reward can improve a particular ability without automatically furnishing the interpretation that will make that ability useful.
The camera makes him an apprentice again
At his first substantial scene, Lu is given a camera while his mentor handles other work. An apparently straightforward death requires careful recording. The pleasure lies in watching small choices acquire significance: where he stands, what he observes before moving and which measuring reference he selects. His mentor notices those decisions. The system has provided experience, but another professional's cautious reassessment gives the competence a social consequence.
There is also something reassuring about a hero who still has to listen. Lu's photography is unusually strong, while other parts of collecting and handling material remain things to learn from the team. The opening allows his seniors to be useful instead of making every experienced colleague an obstacle awaiting humiliation. Their knowledge concerns what traces can mean, not just how to operate equipment. That distinction creates room for genuine apprenticeship inside a progression fantasy.
An office has to eat while a case stays open
The four-person scene investigation unit gives the procedural material a human scale. Its members return tired, organise evidence, prepare reports and depend on food remaining available after ordinary mealtimes. A hot meal is a small but persuasive sign of an institution supporting work that cannot end neatly at a scheduled hour. Their labour involves bodies and backs as well as cleverness, and the older officers feel the hours differently from their eager new colleague.
The story also distinguishes a factual record from a theory about what happened. Lu must document what the photographs show before his suspicions can become useful to the wider investigation. That is an appealing narrative restraint, even when the book's other procedural claims deserve scepticism. He has taken the pictures well; he still has to discover whether he has understood the room they preserve.
The second look takes most of a night
Lu's decision to keep examining the photographs is the opening's best stretch. The scene is not glamorous. He enlarges images, checks objects, tires his neck and works through a dwindling supply of cigarettes. The possibility that the answer is already visible creates a patient sort of tension. An ordinary action at his own desk eventually shifts his attention back toward an ordinary object in the recorded scene.
His mentor has stayed nearby and fallen asleep. Lu covers him with a blanket before returning to work, a gesture that makes their later shared urgency more satisfying. When a possible discrepancy emerges, excitement has somewhere human to go: somebody else can wake up, understand why it matters and help test it. The exact clue and its consequences are worth discovering without a review laying out the solution in advance.
A day off is a surprisingly good prize
Recognition changes the office in modest, enjoyable ways. The newest member finds breakfast waiting and seniors treating him with fresh warmth. A day's rest initially puzzles him until someone explains its value. The response is more convincing than endless applause would be because it belongs to people who know what losing a night of sleep costs. Success has earned him a little care as well as another system notification.
The narration frequently overstates technical certainty, and the coarse asides can intrude on material that works better without them. Yet the beginning offers a clear attraction beyond its convenient interface: a specialist grows useful by looking patiently at what others have already looked at. Try chapter one for the volatile wedding entrance, then follow the camera into the quieter work. The next unsolved file promises a different kind of satisfaction—finding out which assumption a careful second look might unsettle.
Based on chapters 1–8 of the English edition. This is an opening impression, not a full-series verdict. No later plot developments are discussed.
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