Son Wendy, an ordinary girl with a troubled past, finds herself arrested over a murder that she did not commit. To get herself off the charge, she needs to get close to the Queen of The Underworld, Bae Irene. If she doesn't, the death penalty awaits her.   

Follow the tale of Bae Irene, a high school girl who hates her school life. She then meets Wendy and Seulgi, and her life isn't going to be the same again. 

Catching a serial killer is not easy. Especially when you love her.

Jessica and Tiffany. The two greatest friends that ever had the fortune to meet one another. What started out as just a simple 'sisterly' friendship turned into something much, much more. Love. The thing that they never thought they would feel for each other. On the other hand, there is Krystal, Jessica's younger sister who is so helplessly in awe and admiration of the school's 'Perfect Girl', Yoona. She never th