Sung Sooji wants to stop Baek Harin from playing this brutal game called "Pyramid Game" however, Baek Harin, the villain doesn't realize that she's inlove with Sooji. There's the reason why Baek Harin made the game which she wants Myeong Jaeun (her childhood friend) to suffer due to their past. Meanwhile, Sung Sooji has a secret feelings for Meong Jaeun.

harin is obsessed with her classmate, sooji.