So
Spoiler!
They reach a fork road but Callisto doesn't hesitate and tells her it's a passage only known to the royal family. Callisto insults the kidnappers. Of course there would be secret passages in the imperial palace. Thanks to that he could find her. She asks whether the second prince knew about the passage but he doesn't know about this one. This is the Empress' palace so the second prince and his mother have never been here before. She mentally calls Eclise crazy because he obviously locked her in the Empress' palace with a meaning.
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 