When Emma Pillsbury and Will Schuester have a daughter Grace they end up giving her up. They aren't married at the time and don't have time for a little girl. Shelby Corocan and one of her daughters Rebecca take in Grace.Grace lives most of her life as part of The Corocan/Berry family and in Vocal Adrenaline. When Rebecca and Vocal Adrenaline realize Grace is acting weird and missing out on practice, they realize something is up. They need to figure out what is up before it gets out of hand(and before Grace figures out her parents).