User blog comment:AgentP/Phineas and Ferb movie/@comment-1758246-20100130113527

Doofenschmirts has created an inator that takes away everyone else' ability to sing. Phineas and Ferb are caught off guard by this when they try to sing about their latest project. Coincidentally, Linda is having a short comeback concert for the day. Phineas and Ferb search for what is making it impossible to sing. Doof purposely causes his inator to malfunction, making the effect permanent. Perry is captured by Doofenschmirts.

Will Phineas and Ferb be able to find what is making it impossible to sing? Will Linda's short comeback concert be canceled? Will Doof prevail and become the only person in the world that can sing?