Taeyeon was on the verge of ending her life after a series of unfortunate events that have happened to her. But like an angel that was sent from heaven above, Luhan appeared in her life and got her back on her feet again. He was like a band aid that healed her and sealed the scars from her painful memories

After witnessing a tragic car accident, Taeyeon is reminded of her past. This past had left such a deep and damaging scar on her that she feels obligated to fulfill the favor assigned to her. She, together with this stranger she just met, will make a promise that will completely change their lives. Will they be able to carry out the favor and keep their promise or will they not? Is this really love or is it just their guilty conscience taking over? Moreover, will something or s

Taeyeon has been keeping her dark past to herself for a long time. The only person she has told it to was her best friend, Sunny. Fate allowed Taeyeon to meet Luhan, an angel sent down from heaven who seems to be able understand her. Connected by a book that meant a lot to the both of them, Taeyeon and Luhan developed a friendship that is going to last forever.

Taeyeon lives with her uncle after the death of her parents. At a young age, she was trained to become a highly skilled killer. Taking the lives of innocent people who had nothing to do with her, Taeyeon have became emotionless and indifferent. But that changes when she meets her last target whom unexpectedly has something to do with the death of her parents. Will she be able to kill him and take revenge for her parents or will she get into a situation that she herself cannot imagine? Will