Lee Donghae, a resident of the future, takes himself to the past era in order to get the material he needed for his research. However, he was trapped in a warzone where mercy is nonexistent. How can he ever face the challenge?  But then, in the midst of the despair, some light sparked from above. It was Yoona, a native from the past, a lady living in the warzone and the only girl who made Donghae felt he's special. He loved Yoona. He loved her so much that he will all