The movie overall was good. Amazing cast that made the movie feel so real and the plot was just right. Love how they kept the viewers locked in the whole time. Never a boring part the whole 2 hours and 22 minutes. Didn't understand how Kim Soo-hyeon captured Kyung-chul earlier in the movie and let him live. But later in the movie you'll understand why he did it. Overall fantastic movie.
P.S. recommend anyone younger than 16 years of age to not watch as it contains 2 nudity scenes of women, one of which being a high schooler, and graphic/gore scenes.