Su Wan, a graduate student in the Department of Modern Astronomy, accidentally traveled through time and became a concubine in the Jingyuan House. Faced with harsh treatment from her aunt and family strife, she relied on her knowledge of modern astronomy and ancient astrology to stand out in the family feud. On a rainy night, she rescued the mysterious man Shen Yan who was being hunted, but was involved in the massacre of the Dingguo Duke's family and the shocking conspiracy of Prince Qing's rebellion. Taking the "Hoshigaki Secret Scroll" as a guide, the two went from family infighting to court games to solve astrological puzzles, expose the ambitions of powerful officials, and ultimately rewrite the fate of their family and country amid the astrological changes.
