Ensemble Academy: The First Term

Allie Greene starts at Ensemble Academy for the musically gifted, hoping for a new start away from her large family and life of being picked on. However, she finds that most people at her new school are rich snobs and so look down on her for being a scholarship student.
Allie manages to make two friends - Carla and Argentina. But when Argentina has to leave, Carla and Allie make plans to help her run away, but the next day both Carla and Argentina are gone, and the Headmistress says there were signs of a struggle.
Allie tries to out it out of her mind, assuming they staged it and ran away, but then a few more students start disappearing across the school, and rumours start to fly. Allie finally decides to investigate, and finds a few items that should not be there, along with her roommate/bully Brittany Carrington. Brittany is unwilling at first but ultimately decides to help Allie, along with her sidekick Melody.
The three of them start to investigate and find that the disappearances are all linked, and theres secrets that someone doesn't want discovered.