Everlasting Vows: Crown and Knot

Everlasting Vows: Crown and Knot Plot:

Su Xiaowan, a common girl, signs a one-year marriage contract with Gu Yanshen, an "unemployed programmer", to save her terminally ill mother. But after marriage, she discovers that her husband’s "shabby rental house" is a royal palace, and his "part-time delivery job" is an incognito visit—Gu Yanshen is the empire’s missing crown prince who has been gone for three years! When Gu is forced to return to the royal family to inherit the throne, Su gets involved in a conspiracy because of the red knot they made on their wedding day: the knot hides the late queen’s suicide note, which is crucial to the legitimacy of the throne, and the royal family sees her as a "gold-digging commoner". Between the easily attainable crown and his wife with whom he’s falling in love, how will Gu keep his promise of "everlasting vows"? Can the secret in the red knot unlock the fate that binds them?