Kim Sung Gyu, a boy who can saw the history of any incidents or people through physical touch. He become a bit of a loner ever since the end year of his middle school when his parents were killed by someone. Ever since that day, he was determined to find the killer in order to take revenge of the death of their parents. However, everything started to change when a transfer student named Nam Woohyun got deeply involved with his problem as mysterious cases and murders got in their way. 

Carefree ace and team Leader of a homicide crime unit squad, Byun Baekhyun is not what he seems to be as. In fact. He is a person who tries to cover up his real identity  by trying to become someone he is not. Baekhyun is also well known for his special abilities, he has an ability to read someones memories and erase someones memories just by touching them, some say that baekhyun is the mastermind to all cold cases that were solved and revealed to the public.    Bae Taeyeon, k

She loved him first, but he forgot about her as soon as Yeon Doo came into the picture. She protected him and helped him with everything he wanted, but what about when she needs help?