What made this series different for me was not its story, but rather what was happening beneath the surface of the narrative and within the characters. Joon Mo, as a good man and also as a good police officer, had seemingly correct beliefs that formed the foundation of his existence and life, and these beliefs drove Joon Mo towards striving to preserve and strengthen goodness and defeat and destroy evil. Now Joon Mo has been called to fight the "worst of evil." It is a fight that aligns with his ideals and validates and reinforces them. So he enters the Ki Chul gang. At first, everything he sees is nothing but ugliness and corruption, something that serves as confirmation of his hatred for Ki Chul and his people and the necessity of their destruction. At this moment, Ki Chul is exactly the devil to Joon Mo؛ Thus, his beliefs are reaffirmed and become stronger. Until his love get a foothold in this story, and this event is a prelude to a new chapter full of turmoil and confusion within Joon Mo's inner world. Initially, Ki Chul's connection with Joon Mo's wife frightens and angers Joon Mo, increasing his hatred towards Ki Chul. But on the other hand,Ki Chul's sincere and pure love for Joon Mo's wife reveals something about Ki Chul to Joon Mo. "Ki Chul also has heart." Gradually, this aspect of Ki Chul becomes more vivid and apparent to Joon Mo. He loves all his gang members like his own brothers, he is loyal to them and he does everything in his power for their happiness. He has photos of his gang members in his office, photos that resemble more family or friendly pictures depicting relationships filled with love and affection rather than a group photo of gang members. Ki Chul is trustworthy, and that's why he easily trusts others. He loves Joon Mo like a brother from the bottom of his heart, and Ki Chul doesn't just keep Joon Mo by his side for his own protection; Joon Mo's life is valuable to Ki Chul, and Ki Chul tries to keep Joon Mo away from danger even if keeping Joon Mo away from danger is dangerous for Ki Chul himself. Like Joon Mo, he too had a difficult childhood, but unlike Joon Mo, he didn't have a helping hand to pull him out of that quagmire. Ki Chul was like someone who had fallen into a dark, terrifying, and seemingly unsolvable maze for years and had been waiting for the smallest ray of light to show him the path to freedom.Joon Mo and his wife were that ray of light for Ki Chul, which gave Ki Chul the good news of liberation and gave new life to his hope. The hope that he, too, could be good, be loved, and experience a normal life filled with love, security, and peace of mind. Perhaps Ki Chul knew that this light wasn't real, but with all his being, he wanted to believe in this beautiful lie, so he denied anything that questioned its truth and correctness.
During his mission, the closer Joon Mo got to Ki Chul, the clearer he saw the beauty within him. Hae Ryeon was also like Ki Chul, hiding a pure soul beneath a tainted exterior. The truth within Ki Chul and Hae Ryeon was what shook the rooted beliefs and ideals of Joon Mo. Should he act according to his own beliefs and destroy this group of demons, or should he accept the truth he has encountered and join forces with Ki Chul and Hae Ryeon? The truth that told him, the demons that you wished to destroy, have a more beautiful inside than the demonic angels around you. Joon Mo's inner self is filled with turmoil and conflict. He finds himself at a crossroad where every direction he looks, there is nothing but pain waiting for him. If he remains faithful to his beliefs, he must bury the truth he has discovered within himself and accept a lie that would result in the destruction of the angels who have been dressed as demons by the cruelties of life. But if he chooses to embrace the truth, nothing of Joon Mo will remain. This ideal within his being requires him to rebuild his existence from scratch and accept that everything he has believed and acted upon so far has been meaningless, purposeless, and wrong. Furthermore, he unknowingly initiated a game where victory and defeat come at the cost of life, and now that he has fallen to its depths, he cannot abandon it halfway or return to before its inception. Therefore, the only thing he can do is try to play the game in the most beautiful way possible. And that's exactly what he did.
He presented the most beautiful game of his life. He fulfilled his mission correctly, but at the same time, he removed Ki Chul and Hae Ryeon from the game and gave them an opportunity for a normal and better life (the very thing Ki Chul had wished for). However, Ki Chul made his last wrong decision.
Perhaps, as Joon Mo said, all the decisions Ki Chul had made until that moment were also wrong.
Kie Chul's comeback scene is Joon Mo's greatest moment of desperation. He understands that nothing can be set right anymore, and there is no correct decision. He must only seek the best decision. Ki Chul has turned back, and now the only things that await him are either death or a life where death is a wish. It is an eternal life in prison, where dying is the sentence of freedom. Ki Chul and Eui Jung are both devout Christians, and suicide, have a force of curse for them. Ki Chul wants to burn Eui Jung in the fire of his eternal curse by ending his life. A curse that not only consumes Eui Jung's world but also burns Ki Chul's afterlife. Joon Mo decides to shoulder the burden of guilt for Ki Chul and Eui Jung alone and free them from this eternal torment. In that moment, he chooses to protect them at the cost of losing his spouse and comrade. Now Eui Jung can blame Joon Mo instead of blaming herself for Ki Chul's death and she can hate Joon Mo instead of hating herself. What ultimately remains are deep and precious friendships. The friendship between Ki Chul and Eui Jung, symbolized by the bouquet of flowers accompanying the cross necklace on his grave, and the friendship between Ki Chul and Joon Mo, symbolized by a cigarette that was divided between Joon Mo and Ki Chul. Joon Mo's ring ultimately came off his finger, but his watch never came off his wrist.