I was excited to see this as two of my favorite actors were in it: Cha Eun Woo and Lee Jung Suk. Both really flexed their acting muscles as this story was outside their normal genres.

The story itself was incredible. I went into it expecting it to be like the US movie Speed; instead of going over 55 mph now the bombs were set to go off if they reached a predetermined Decibel level. While the last part was true, there was a very distinct reason and not just random, wanton destruction because someone is mad. The story moves along quickly, not a dull or slow moment. It is heartbreaking. This aspect I wasn't expecting so I warn others. Tissues are needed. Halfway through is when all the threads get pulled together. You gasp and then hold your breath as the realization dawns on you as to what is going on.

This movie was extremely well done. Nothing over the top as far as violence, stunts or special effects. They fit the scenes and what was needed. The music chosen worked, just didn't really catch my attention as far as OSTs go but wasn't horrible. This is one I will re-watch multiple times to catch the subtle clues that were dropped earlier that were missed due to subtitle reading.