Amara's sister Mia has been kidnapped by Thirteen. A monster, whose identity is unknown. Now Amara has to go back to being a FBI agent to find her sister, but to do that she will have to uncover the truth behind Thirteen first.
She's a fifteen-year-old girl who killed her "father" in self-defense and lied about it to the police. She thinks she has no other family members and now she has nowhere to live but the police tell her she was kidnapped from her real family when she was little and she has six older brothers.
Now that she has to go live with them, she can sense they're all hiding something from her. But what could it be?