The emperor ruined Song Yi'an's family, so she revolted, for herself and her family, and for the common people. However, her brother forgot her original intention and had differences with her. The siblings separated, so she devoted herself to the world. Later, she met Fu Zhao, and the two met and fell in love. However, Fu Zhao died soon. She solved several strange cases to save him, and got into trouble again and again. Finally, he saved his name, and the two of them worked together. Avenged her and awakened his brother's original intention.
Intention: Only justice in the world will last forever