Xie Yanzhi's court was falsely accused of collaborating with the enemy. At the critical moment, he threw out the secret message in his dragon robe. The bloody pattern was obvious and the whole court lost its voice. Liu Zhaoran saw through the secret text, and it turned out to be the late emperor's edict - the person who holds the throne is not the prince, but Xie Yanzhi. The left prime minister Cui Hongjian secretly silenced him, the commander of the imperial army Shen Xiao wavered in his position, and the crazy seventh prince Xiao Yunji secretly planned the plot. A dragon robe affects imperial power, bloodline, injustice and centuries-old conspiracy. He is not a powerful minister, but a forgotten true dragon; she is not a eunuch, but she is the only woman who can understand destiny. The truth is not yet known, and the killing has begun.