Noble House of Black

Astra Black was the daughter of Sirius Black. His very own pride and joy. So, why is it that she felt more connected towards the Malfoy name rather than her own Black name?
Truth is, her father was thrown into Azkaban when she was just a baby for the deaths of two of his best friends. Before he was thrown in a cell, he created an Unbreakable Vow with his favorite cousin Narcissa to ensure his daughter's safety while he was away; due to him being unable to ensure it himself.
What happens when he's finally free from his cell, able to care for his daughter once again, but she only knows that of what the Malfoys taught her to know? For fourteen years, she built a closeness around a family destined to be what Sirius never expected for his little girl. Will Sirius be able to save her before it's too late, or will she choose a path she once felt was the one paved for her?

Disclaimer: The world of Harry Potter and all of its characters belong to JKR and Warner Brothers
Disclaimer pt. 2: This world doesn't match what happens in the Harry Potter series - I've taken these characters and created my own little version based off their world.