Very rare for me to cry for a villain and his unrequited love, this movie is excellent! Good thriller with characters that will move you.
Kim Hae Soo did a remarkable job bringing the powerful woman that Na Hyeon jeong is supposed to be and at the same time bringing forth the vulnerability that comes from her character's past.
At no point do you doubt that she's absolutely capable of doing the badass things that her character does. Tbh this is more an action thriller and it's not something with too much depth but still pretty entertaining and not exactly shallow either. The characters might not be as fleshed out but they're not one dimensional either.
So, like I said, an effective action thriller.