Gyeo Wool (Park Se Wan) might look like just another normal high school student but in reality, she harbors a dark secret: she’s actually a trained killer. Posing as a transfer student to hide her true identity, Gyeo Wool does her best to blend in, but it’s not easy. Especially not after she meets Yeo Reum (Song Geon Hee).
Unlike his classmates, Yeo Reum spends most of his life feeling nothing at all. Having experienced extreme trauma in the past, Yeo Reum is only able to feel alive when he’s in pain. Accepting pain as his only connection to a “normal” life, Yeo Reum has no problem getting involved in Gyeo Wool’s life, especially not once he realizes there’s something very different about her.
Though neither expected to be involved in each other’s lives, Gyeo Wool and Yeo Reum have no choice but to stay together after a criminal organization begins to hunt them down. Will this unlikely duo prove victorious in an increasingly deadly game of cat and mouse?
