In the immortal realm, the fairy Ran Qing and the Asura King Xuan Ye had fraternal twins. Their elder son, Ying Yuan, looked like Xuan Ye but had Ran Qing's temperament. Their daughter, Xi Yue, was the opposite: she looked like Ran Qing but had Xuan Ye's temperament.
As the God Realm's sovereign, Xi Yue was the first to break the rules and be punished, and she was left alone in Changle Palace.
Tens of thousands of years later, the lotus flowers bloomed, and Ying Yuan fell in love. Naturally, Xi Yue, as his younger sister, had to help him win his beloved!
This is basically a story about how Xi Yue helps Ying Yuan pursue his wife, and how she acts like their scummy father, playing the innocent to steal someone else's partner.
Theme: An unresolved regret