The story of a bizarre cat-faced case. Lin Qi, an intern actress and Situ Yan, a genius with obsessive-compulsive disorder are partnered together to make a detective show "The Mirror". With keen observation ability and subtle logical thinking, they solved weird and difficult cases. At the same time, Situ Yan was also attracted by the straightforward and lovely Lin Qi, and the two became closes in a state of friend and foe. However, what lies before them is a sealed dark past, a bloody wound that has to be opened.