Gortimer's curiosity is piqued when he discovers a mysterious signature. Is it the autograph of a new student at Normal Middle school... or has it been here all along?

With his Dad in town for a short visit, Gortimer goes out of his way to ensure his happiness doesn't fade by creating a rainbow over Normal Street. But once all of the residents start acting unusually happy, Mel and Ranger wonder if he's gone a step too far.