The jade button is stained with frost, and the old friend is pretending to be dead; the journey to a close relative is far away, and a secret fetus is hidden in the belly. Princess Nangong Wenxin of Beiyan was abandoned in troubled times, and her protégé Wen Zhan ascended to the throne through bloodshed. He used the country as a cage to imprison her with paranoia. When Gu Yunzhou wore armor and broke through the city and came back from the dead, the obsession of the emperor collided with the love of the young man. The conspiracy gnawed at the heart, love and hate were hard to separate. A sadomasochism that spanned life and death finally ended in the imperial palace.