Emily Prentiss joined the BAU just recently and everyone's really nice. But one thing still makes her insecure. She hasn't met the whole team of the BAU, yet. There's still Hannah Reid. Spencer's twin sister... He is a real sweetheart, but as soon as she asks about his sister he changes the subject of the conversation. Hannah's been on a special mission no one talks about and finally returns home... The relationship of Emily and Hannah turns out to be one of these special bonds, that everyone wishes to have in their life with someone.