Shen Qinghuan, the legitimate eldest daughter of the Duke of Dingguo's household, is delicate and gentle, but she's so frail that she gets winded after a few steps.
No one knows that her true identity is the master of Tianji Pavilion, the greatest assassination organization in the world.
After a scoundrel and his lover scheme to switch her marriage, she goes along with it and marries Xie Jingxing, a disabled imperial uncle with power over the court.
After entering the prince's residence, Shen Qinghuan acts like a helpless, delicate princess consort by day, but at night she tirelessly builds repeating crossbows, muskets, and mechanical beasts in the residence's storeroom.
Then one day, the enemy forces advance on the capital, and the scoundrel Crown Prince prepares to open the city gates and surrender.
The residence's gates swing open. Riding a steel wooden kite, Shen Qinghuan soars into the sky, and countless mechanisms strike at once, wiping out the enemy forces in an instant!
The whole realm is stunned!
The decisive Regent King Xie Jingxing pulls her slender waist into his arms and declares to the world, “My princess consort is timid. If anyone dares to frighten her, my Black-Armored Army and my wife's mechanical divine beasts won't stand for it!”
