After thirteen years of hard work at the border, she is a young captain guarding the country with a silver spear; the one who cannot be trapped by red walls and red tiles is the legitimate eldest daughter of the general's palace. Once he returned to Beijing, he took off his military uniform and changed into a skirt, but he could not hide the sharpness in his bones and blood. The poisonous stepmother hides a killer move, and she is careful at every step, and her reputation will be discredited with the backhand; the green tea sister pretends to be ingratiating, and she speaks sharply and pokes holes in the mask of hypocrisy with every word. Fighting in a deep house is just a small test of her skills. The storm in the court and the chaos at the border are her battlefields. As a daughter, she disturbed the situation in the capital, secretly conveyed secret reports from the border, and silently uncovered the enemy's treacherous plans. When the smoke of war breaks out again, and the sound of fighting and iron horses shakes the world, she puts on armor again, stands with a gun in hand, and guards thousands of miles of mountains and rivers in the name of her legitimate daughter!