Synopsis：As a child, Yeonji was tormented by the bully Suhyun, and eventually buried those memories as she grew up. But when her father remarries, her nightmare returns—Suhyun is now her stepdaughter. The bullying starts again, dragging Yeonji back into hell: she loses friends, destroys her health, and hits rock bottom. Instead of breaking, she decides to fight back, quietly gathering allies and plotting a calculated revenge. Even if her plans fail and the risk is deadly, Yeonji is prepared to stake her life to completely ruin Suhyun’s.