The story takes place during the Northern and Southern Dynasties. Zheng Caifeng, Caiping, and Zheng Mi were all a secret force under the Northern Zhou Dynasty, helping the Northern Zhou Dynasty to create internal chaos in other countries. It was cultivated by Yu Wentai earlier and later passed on to Yu Wenyong.
Zheng Mi was adopted by Caifeng and Caiping since she was a child. She didn't know that the Zheng sisters worked for the Northern Zhou Dynasty, so she retained her true temperament.
The beginning of the story is that he moved to Northern Qi Dynasty on the grounds of "returning to his hometown", with the purpose of helping Yu Wenyong fulfill his wish to unify.
It's just the entanglement of love and hate that can't be described in just a few words?