In the Great Yong Dynasty, mathematics reigns supreme. Shen Weiwan, a concubine-born daughter of the Shen family, seems like a useless airhead who has never studied a day in her life. In truth, she is a hidden prodigy, skilled in both mathematics and medicine. To investigate the cause of her mother's death, she plays the fool and marries Xie Jingxing, a “good-for-nothing minor official.”
On their wedding night, they each head out to investigate a case. One pretends to be foolish, the other acts like a good-for-nothing. The two masters of disguise stare at each other, then strike a tacit deal to help expose each other's secret identities.
She calculates every account under heaven and trounces the scions of noble families at the mathematics competition. He turns his sword against the corruption at court. When the bronze counting rods come together, the truth behind the world is laid bare.
Watch as this husband-and-wife team joins forces to topple the rotting court!