One is worried about stabilizing the family status, while the other wants to make a comeback and seize the throne again and endures the humiliation; one wants to find out the truth about the death of his father and brother in battle, and the other wants to seek justice for the death of his mother. The two join forces to explore the truth of the unsolved case, break down the stumbling blocks and flying arrows one by one, fall in love, kill each other, and save each other.
