The "Fool" has named Rosetta as the new Lead Star of Kaleido Stage. It is now Sora's turn to assist Rosetta for her new performance "The Princess and the Fool" like the way Layla assisted her.

Sora Naegino has finally consolidated herself as Kaleido Stage's greatest star ever, and a new star starts to shine as Rosetta Passel is selected to participate in the next attraction in a main role. But when things start to go wrong in the rehearsals, Rosetta starts to question her abillity to take the role, as her own capacity to remain in Kaleido Stage. Meanwhile, Fool also struggles with his demons from the past.