Shen Qingwu, the daughter of the general who ruled the country, fell from the clouds into the mire overnight. Her entire family was wiped out, leaving her alone to be forcibly married to Su Yan, a poor scholar from Jiangnan. The gold-plated jade hairpin she carries may seem ordinary, but it shines in times of crisis, reflecting the truth that her father was framed. And this gentle scholar turned out to be the exiled prince of Beilin, having a secret conversation with the man in black late at night. When the emperor's assassins attack, Jade Chai shows off her power, Su Yan shows off her edge, and the two are forced to form an alliance. One wants revenge and the other wants to seize the throne. How will this "couple" who has his own thoughts use the power of the jade hairpin to stir up the storm? What kind of secrets and feelings are hidden under their covenant?
