"Double stars appear, and destiny is in chaos; their rays intertwine, and their destiny is undetermined..."
A vague prophecy determines the very different fates of twin brothers and sisters in the Yan Kingdom. The prince Yanlin was regarded as auspicious, but the princess Yu Jin was secretly sent to her mother's country, the country of Yu, for foster care, and her flesh and blood have been separated since then.
However, God's will plays a trick on people. The mighty Sheng Kingdom trampled the mountains and rivers of the Yan Kingdom to pieces, and under the cover of the nest, rumors started to rise again. In order to avoid future troubles, the tyrant Sheng Xiao ordered a ruthless purge of Yanguo's old troops. In times of crisis, the benevolent brother Yanlin wants to step forward and sacrifice his own life for the peace of the people.
But this time, the sister who was thrown away by fate since childhood is determined to take back control of her life! Yu Jin concealed her identity, used her astonishing talents to work on the blade, and gave advice anonymously. As a "behind-the-scenes counselor", she resolutely stepped into the center of power of the Sheng Kingdom, surrounded by tigers and wolves, and sought skin from the tigers, just to achieve an almost impossible deal: using her talents to exchange for a glimmer of life for the survivors of the motherland.
On this thorny road, she met Shengxuan, the prince of Shengguo who seemed to be a playboy but was actually secretive. Both of them wore masks, and they began to test and exploit each other, but gradually became confidants and allies who reached the same goal through different paths in crisis after crisis. At the same time, Yu Jin and her separated brother cooperated internally and externally, gathering strength secretly.
Wisdom and scheming clash in the court, and undercurrents surge in the night. From the anonymous "Mr. Qin" to the key hand stirring up the world, Yu Jin strategizes and challenges the powerful as a woman. When the tyrant's suspicion turns into deadly poison, and when the final vision comes, can the light of the twin stars dispel the darkness?
