Billie walks around the attic getting potions together. Piper walks in holding Chris in her arms and Wyatt following behind her. "Where are you going? Piper asked "To kick a demons ass." Billie quickly said making a break for the door making it out the door. "Billie!" Piper calls. Billie walks back into the attic. "Yeah?" Billie asked "What demon?" Piper asked her. "The demon I believe has my sister." Billie explained looking Piper straight in the eye. "We're going with you." Piper said "You can't. This is my fight. "Billie told Piper serious. "I know Billie, but you can't do this alone." Piper told Billie then looking up at the ceiling. "Paige!" Piper yelled calling for her sister.
Paige orbed in front of Piper. "You called?" Paige asked looking at her sister then Billie. "What's going on." Paige asked. "Billie thinks she found her sister and the demon who may now have her. I need you to go get Phoebe from work." Piper said walking out of the attic.
"Do you know where this demon might be?" Paige asked Billie. "The underworld. I herd one of the demons talk about Christy at magic school." Billie said. "And you just happened to be there?" Paige asked confused on how she found her. "Yeah, I was there to vanquish a demon I've been tracking and some demons where there so I hid." Billie explained. "Did you vanquish him?" Paige asked "Sure did. After the demons shimmered away." Billie said matter of factly.
"Where is Phoebe?" Piper asked walking back in without the boys. "I haven't gone to get her." Paige said "Go get her." Piper said with a hint of concern in her voice.
Paige orbed away. Piper looked at Billie. "Are you sure they're in the underworld?" Piper asked. "This is particular demon lives in the underworld." Billie informed Piper. "Piper, we are so close." Billie says worried.
Paige orbed in with Phoebe. "Okay, Billie has some potions. The boys are with Le--… Victor. So, let's go." Piper said missing Leo. The boys would have been with Leo not Victor. Things had been so hard since Leo was iced. She walked over to Paige and put her hand on her shoulder. Phoebe and Billie joined them and waited for the feeling of being orbed.
Paige orbed them to the underworld. A demon stood near them with a young woman who was standing in front of them. Piper put her arms up, but the demon ran. Piper and Paige ran after him. Phoebe went to the young woman. "Are you okay?" Phoebe asked her wanting to make sure she was okay. "Yeah, I'm okay." The young woman replied. "Billie?" The woman asked surprised. "Christy?" Billie asked just as surprised.
The two women realized who each other was and hugged. "Where have you been?" Christy asked "Looking for you." Billie said holding back tears. "There is something you need to know." Christy told Billie. "What is it?" Billie asked. Christy glanced at Phoebe then back at Billie. "When you were like two. Dad had an affair with a demon. Dad never knew that what she was….she had a child, Brook Lynn. Mom and dad never knew about her and mom never knew about the affair. Brook Lynn's mother took her away. We need to find her, Billie." Christy told her little sister. "We will." Billie said looking at Phoebe shocked at the news. "We will definitely help in anyway we can." Phoebe said.
A demon appeared throwing an athame at Christy and then shimmed away. Christy fell to the ground with the sound of Billie screaming Christy. Billie rushed over to her older sister crying and held her in her arms. Phoebe rushed over, too. "Find her. Protect her. Be the sister I wasn't able to be." Christy asked Billie her breathing slowing down. "I promise." Billie promised Christy tears falling down her cheeks. Christy stopped breathing and died.