Whereas most thrillers reveal the villain towards the end, I was pleasantly surprised that the psychopathic serial killer was revealed right away in the second episode. From there, the story followed Cha Young Jin in her quest to avenge her best friend's death.

Cha Young Jin led her life in darkness, blaming herself for being partly responsible for the death of her best friend. She was so consumed to find her friend's killer that she hardly noticed that people around her cared for her like Eun Ho who looked up to her as his hero and best friend. Hwang In Bum, her boss, protected her and willingly accepted being fired so she could keep her job. Her co-workers highly respected her and were also a bunch of very good characters. Unbeknownst to her, she was changing the lives of Sun Woo who cared for his students but felt inadequate as a teacher, his students and Eun Ho's friends, Dong Myung and Min Sung. Through her, they overcame their animosities and became the best of friends. It was towards the end that CYJ realized that she was not lonely afterall and finally appreciated the fact that she's surrounded by good people.

Now, about my beef with this drama. The "New Life Gospel" was just a red herring that was probably used by the writer as filler. There was so much hype and "big" mystery surrounding this little blue book containing hidden codes. The codes were supposed to be interpreted by Ki Ho, but alas, just fizzled to a nothing burger. If the character of Ki Ho (not a reflection against Kwon Hae Hyo because I do like this actor) and the plot surrounding this book were eliminated, it would not change the flow of the drama at all.

Kim Seo Hyung did justice to her character although some of her crying scenes were just a tad over-the-top especially for someone who projected an emotionlesss, aloof and cold persona. I did love her fighting scenes though. She was also far too skinny and she looked emaciated and anorexic that I almost cringe when I see her bony frame.

I love, love the ending. The juxtaposition of dark and light were brilliantly presented through cinematography. In keeping with the theme, the scenes were quite gloomy from the dark clothes worn by CYJ (she was almost always wearing black) to the gloomy background (cloudy days and night scenes). Then, like the sun breaking through the clouds, scenes full of light and beautiful scenery appeared in the last episode when CYJ finally got her revenge and her relationship with Eun Ho and his friends blossomed. She wore white and cream as a reflection of her joy of being finally at peace.

For a thriller, this drama was also heartwarming in that it demonstrated that love and friendship do triumph over evil.