Sulli and Myungsoo are best friend. Or that’s what Sulli thinks. Myungsoo fancy Sulli but kept it a secret because he didn’t want to ruin his friendship. So after soo long he wanted to confess about his feelings however this didn’t happen due to Sulli’s parent’s car crash. Sulli and Myungsoo drifted apart because of Sulli’s grandfather. But magically they met each other. As a detective.  Sulli changes her name to Kim Eunji. To find out her parents death. Her parent’s death was not an accident as she has witness. And the answer lies between the poor detective Lee Joon Suk. Myungsoo became a detective to find Sulli. He got black belt in nearly everything but he never mention it or brag about it. Sulli is also trained. She fights really well and that’s why they both had been transferred to a detective office in soul. Myungsoo is a cold guy just like any other rich guys. During fighting crimes with Sulli Myungsoo noticed that Kim Eunji had the same behaver as Sulli. And then during an unfortunate event he found a scar behind Sulli’s back which was the same as sulli.