Mia is teamed up with Violetta for a science project, much to Mia’s dismay. An uncooperative Violetta insists she has everything under control, rejecting Mia’s earnest attempts to do the work. She undoubtedly intends to cheat, but Mia’s real concerns lie in Centopia. Phuddle has created a strange new instrument: a calliope that draws in and mesmerizes its listeners. Unfortunately, it seems to be attracting the wrong kind of attention.