After Seonghwa passed, all Y/N had left from him was a small puppy that he got her so she wouldn't have to be alone. Y/N was happy that she had something left from her late-husband. She knew that with that dog he'd never truly be gone. Then, someone kills the one thing she had left. This maddens her, bringing her back into the life of murder she had previously left. She sets off on a mission to kill everyone who led to the death of her dog out of revenge. "You're willing to die for a dog?" "I'm more than willing to die for the last thing my late husband got me."