How did the story develop after the swallow learned that the emperor had killed his father?

This is an unfair case. When the swallow learned that the enemy who killed her father was the emperor, she was very angry and rushed to the emperor, waving her whip. However, after her brother persuaded her to stop, she was tired and didn't eat or drink until she became ill. Later, the emperor comforted her and recovered. The emperor sent someone to investigate, and finally the truth came out. I think the swallow is next. Are they going back to the palace?