Sigh, I swear to god at this point I have just decided to drop anything with Gong Hyo Jin in it. Her acting and her horrendous singular facial expression makes me want to tear my face out.

Yet again, second leads and support roles save whatever hell she's in. Ryu Joon Yeol as pure badass stole the movie, had goosebumps when his switch flipped. Jo Jung Suk's character development acting style was very engaging.

Cinematography was very good, SFX were good.
Shift+Delete Gong Hyo Jin and this would be a 10/10.