What dream does Nadira describe in the beginning of Section 14: Chapter 18? Who awakens her, and why?

Nadira dreams her family is swimming inside a map with Canada on one side and a courthouse on the other. Unsure which way to go, they grope forward blindly. In the morning, Ma hurries her family to get ready because they cannot be late for their final immigration appeal. Ironically, she is the one running late, but she looks strangely beautiful.