Shen Zhao, a modern-day female security instructor, transmigrates and becomes the most inconspicuous female guard in the Great Sheng Dynasty.
On the very first day she wakes up, she receives a death sentence of an order: protect Xiao Chengyuan, the nation-guarding general, who has been poisoned, stripped of his military command, and made the target of suspicion from every official at court.
Everyone is waiting for Xiao Chengyuan to die.
The emperor wants to reclaim his troops, the crown prince wants to destroy the evidence, enemy spies have already infiltrated the capital, and even the general's residence hides a traitor. Shen Zhao originally only wanted to complete her mission and find a way home, but she discovers that if Xiao Chengyuan dies, the 300,000 frontier troops will be left without a leader, and the Great Sheng Dynasty will fall within six months.
She has no choice but to stand between the nation-guarding general and the entire realm, as a woman.
