The concept of this film is derived from the fact that what if someone had unlimited use of your smartphone and how much damage he could do to your life.
The movie is about an elusive serial killer who has a habit of stealing the smartphone of his chosen victim and stalking them and finally terminating them.
The film shows digital crime in this modern digital era. The plot concerns a young and enterprising woman who has a great ambition to succeed in life. However when her smartphone is stolen and her identity manipulated by the thief, slowly her life turns into a living nightmare.
Thrown into the mix is a veteran cop who is desperately searching for his missing son. The lives of these two individuals will be slowly entwined into a dramatic climax.
Verdict: I've seen many good Korean films in my life: I Saw The Devil(2010) and The Man From Nowhere(2010) being prime examples of how good the Korean film industry is. This film is excellent from start to finish, you will never feel bored. However the movie is not meant for repeated viewing unlike the two movies I mentioned earlier. You'll watch this film once and never care to see it again.