How
1. Become Leader
2. Go to Moonstone
3.Listen to Prophecy
4. Go to Fireclan Border
5. There should be an arrow, click on it
6. defeat Firestar
7. Talk to Breezepelt
8. Say "Yes" when she asks you to meet with her at the Fireclan border
9. Meet with her in Fireclan
10. Keep talking with her at the border at night, until she says "I think someone is related to you in Fireclan" something like that
11. Go to FIreclan after she says that