The cast is the main reason, I've been waiting for this movie for a long time and couldn't wait to watch it the moment it came out. Well, I was kinda disappointed but enjoyed it nonetheless.

Story:

Tbh, the story is a mess. They've touched on a wide and complex topic, added in too much only to deliver a portion of it. The first half was a complete mess and I had a difficult time making sense of the story while it straightened out in the second half.
Ji Kang In operates a black team in China and our main lead, Han Ji Hoon is sent there to make a report on him. Well, imagine an office guy stepping into the world of spies and war. He has no choice but to become a part of the team and gets dragged on their missions while making sense of what's going on.
What I didn't like about the story is, that it's too predictable. This pretty much killed all the thrill one can feel in such movies. A couple of twists could've been nice despite the story being too simple.

Acting:

With Park Hae Soo, Lee El, Song Jae Rim and Jinyoung (these are the only familiar faces in this movie for me =D ) in an action movie, how can the acting not be great? They're best suited for such films, especially JaeRim!

Rewatch value:

Nah, not going to watch because the story is all over the place and the action scenes are the only ones worth watching which are too short as well. Yeah...

Conclusion:

If you're up for good action films, do watch it. But be prepared for the story to make a mush of your brain in the first half of the movie!