She and he met under the cherry blossom tree when they were children, but they were separated from her because of his family issues. Just that day later, her grandfather fell in a pool of blood in front of her. From then on, she became ruthless in order to avenge her grandfather; she became a killer in order to avenge her grandfather. ． ． ． ． ． 11 Years later, she meets him again. How can he win her back?