The arrogant female assassin of the first-class arena, the young emperor who rules the world. After ten days of ambush, waiting, and failed assassination, a different kind of love was planted in each other's hearts. From then on, there was constant bickering and confusion. Will he accompany her to wander the world, or will she follow him and enter the palace's treacherous world? Will Lao and Yan be separated and end up sad, or will they sit on the throne and have the killer in their arms?