Legitimate eldest princess Rong Zhaoyue was framed by the consort's husband and the crown prince in her past life for colluding with the enemy, dying an unjust death, and fortunately is reborn back to the eve before the disaster occurred. She holds firm to the bottom line of home and country, protects the frontier generals, collects criminal evidence to oppose the conspiratorial forces, and guards the loyal martyrs and old subordinates of the Qin family. Parting the heavy mists of the imperial court, investigating clearly the old case of the former empress being harmed, pacifying the chaotic situation of the palace rebellion, supporting the state with talent and responsibility, she ascends to the imperial throne, guards the peace of the common people, and interprets the patriotic sentiment of a woman with the world in her heart.