This is a flick that delivers the basic requirements of its genre. Assuming due to its small but talented cast that it was shot with a low budget, I think it's done with mastery and taste. The lead actress Shin Hye Sun is a very talented one and I've been a fan for years. (You've seen Mr. Queen? That's the one. Versatile and never over the top.) The scenes are mostly well-shot, including the immediately engrossing intro which, I think, could have been a little longer. The tempo is nice and without rushing it or drawing it out, the premise is introduced in the natural course of the plot.
In other words: done with a small budget but doesn't feel cheap, well shot, tempo optimal for its kind, good acting.
I don't want to mislead, though: it is a forgettable movie mostly relying on plot tropes and though certain risks the criminal takes to go about doing his stuff might slightly challenge suspense of disbelief, that feeling will go away as soon as you pay attention to what is implied in the movie about the inefficiency and priorities of police force regardless of what desk takes on what task as long as it is a nobody -read your average citizen- that is to be protected.
That's secondary to the point that the movie makes, though. What's it that they drive home loud and clear? That the internet has basically become the Wild Wrst for us nobodies. *
It's a nice movie to pass the time. It's not one to make an impact. (More character development would be needed for that as well as veering a bit more into the drama side.)
*:
Well, most of us know what dangers await internet users in this era where we can do almost anything on the internet and yet can never be too sure of our safety, which we just entrust to a variety of things: security software, reputable institutions, police force etc... Even then, skills and/or knowledge we don't have overpower us. We entrust our safety really more with the idea, a fact most of the time, that we are not important enough to be a target online.
That's the exact victim profile certain types of criminals need, however, like when governments rob us relying on our numbers, for instance, or when companies know we are too small to fight back as individuals such that we have to suck it up most of the time if we find that we're wronged..
The crimes that nobodies commit against nobodies, too, operate on the same principle:you are a target when it becomes obvious that no one has your back. It's what a predator watches out for in their prospective prey.
So why do we make stupid mistakes when we know we can never be too careful? Well...
When you find yourself having to constantly budget your finances, you kind of have to forget you're making a bet on your own wellbeing, to a certain extent... Any decision made by the protagonist that might look stupid hinges on that fact about her. It is up to you to accept that. I find it very realistic in that sense.
