It's too mediocre. Without Zhuang Wenqiang, who wrote the script, Mai Zhaohui really showed his shortcomings in his creation. The plot is not ups and downs enough. He only cares about the grass snake gray line for thousands of miles. However, as an independent film, the viewability is very low, and the performance of the three stars is also regular. They are all in their own safety zone, so it must take no effort to shoot. The only thing that brightens our eyes is the passage of Liu Qingyun and Zhang Jiahui when they were young. It is much more interesting than looking for other young actors to perform. Although I don't like matchless very much, I have to admit that Zhuang Sheng is better this time.

I've never had a DVD disc vibrate while playing before. Freezing. Poor quality. And, they force you watch a food commercial ad in the beginning. Subtitling was poor. Typical Hong Kong crime drama - nothing new, witness is on the run; stereotypical investigators. A killing or two. Very disjointed fragmented storyline.

Despite being billed as hailing from the writing-directing duo of 'Infernal Affairs', 'Integrity' is - like 'Project Gutenberg' - pretty much a solo effort by one-half of the duo. And like the latter, it is only half as good as their seminal trilogy, despite a star-studded cast that includes Sean Lau, Nick Cheung, Karena Lam, Anita Yuen and Alex Fong. Oh yes, even with such solid performances by these Hong Kong veterans, this crime thriller ultimately falls apart, no thanks to some ludicrous narrative twists in the last third that completely undermines whatever measure of suspense the movie had built up before.

To writer-director Alan Mak's credit, it is a genuinely promising setup for a film meant as the start of a trilogy. Sequestered in a hotel room is the whistle-blower Jack (Cheung),who is the prosecution's key witness in a high-profile case of tobacco smuggling and bribery. Despite reassurance from the ICAC's chief investigator King (Lau),Jack is still spooked that his life might be in danger, and flees to Sydney just before he is due to testify in court. So King's boss Ma (Alex Fong) sends fellow ICAC investigator Shirley (Lam) - who happens to be King's estranged wife - to Sydney to persuade Jack to return, while asking King to remain in Hong Kong to follow up on a couple of new leads in the same case.

As it turns out, the first defendant Chan has also vanished along with his wife and kids, such that King suspects the entire fiasco may be masterminded by the puppet master code-named Alpha Leader behind the entire illegal operation. To inject some urgency into the proceedings, the presiding judge agrees to postpone the trial only for a week, giving King just seven days to find Chan and Shirley the same to convince Jack to return to Hong Kong. That becomes impetus for King to trick the case's other defendant Chung (Yuen) into signing a plea agreement to be the prosecution's witness, in order to extract important information on how the whole smuggling cum money laundering enterprise is run.

At least for the first hour, Mak maintains a taut air of intrigue putting in place the various pieces of the puzzle. How far does Alpha Leader's reach extend to? Will he get to Chan before King does? Will he get to Jack before he is able to testify? Or is there more to Jack than meets the eye? Will Shirley therefore be in danger as well? It is not easy to set up such an elaborate tease, and Mak juggles all these elements deftly enough for you to be hooked into the mystery. Undeniably, the actors play their parts beautifully too, with Lau as an assertive but ethically questionable leader, Cheung as an indecipherable poker face and Lam as a tough but warm foil to both men.

Alas anyone hoping for a satisfying answer to any of the aforementioned questions will likely be disappointed. Mak, whose forte is less in writing than in directing, quite absolutely botches the ensuing twists in the story. For reasons not quite unexplained, Alpha Leader's restraint suddenly turns into ruthlessness, ordering not only Jack's kidnapping but also the elimination of almost everyone who has anything to do with the case. But most significantly, Mak engineers a personal connection between King and Jack which feels utterly contrived, and is only made worse in the final few moments when that relationship draws in two individuals whom we were led to believe were sent by Alpha Leader to follow Jack.

Without giving any more away, let's just say that Mak tries too hard to surprise his audience, and with each unfortunate revelation only succeeds in draining his film of whatever goodwill he had built up at the start - which not even the nostalgic sight of both Lau and Cheung in their younger days can quite compensate for. It says a lot when what is supposed to be the tease of the next film leaves us greeting the inevitable next chapter with more trepidation than anticipation, but that is precisely how you'd feel by the time Mak confirms that Jack is as duplicitous as we'd suspected.

Mak is also not quite as skilful a director to overcome his own screenwriting flaws, so much so that the last third comes off both overstuffed and under-developed at the same time. As a result, the pacing also suffers, taking the air out of a tightly wound atmosphere as it careens towards an improbable and unbelievable finish. Not even the two obligatory but superfluous action scenes he stuffs in at this point - including a short vehicular chase inside a carpark and a brief assassination on the slopes of a skiing resort - manages to be distracting enough, seeing as how they are poorly choreographed and hardly exciting.

Frankly, going by both 'Gutenberg' and 'Integrity', it really wouldn't hurt for Mak and his other moviemaking half Felix Chong to settle for more straightforward storytelling. Not every movie needs have a bombshell ending, not least if it requires such a substantive leap of logic that it ends up undermining the whole film. Those looking for a fairly engrossing two hours to spend this Lunar New Year will probably still find this a captivating enough diversion, especially to watch both Lau and Cheung chew up the scenery, but it is no understatement to say that it is no 'Infernal Affairs'. Like we said, it starts strong but ends with a whimper, so do keep your expectations well in check.