Su Tao, the daughter of the guilty minister, was trapped in the cold palace for three years without seeing the sky, and she endured the loneliness and cold snow in order to survive. On the night of the palace coup, flames shot into the sky, the palace was in chaos, and the rebels' iron hoofs shattered the tranquility of the palace. This is a desperate situation, but also a hope. She clutched the dagger left by her father, took advantage of the chaos to escape from the prison, ran towards freedom in the wind and snow, and embarked on the thorny road of clearing her family's grievances and reversing their destiny.