Like the colors of the rainbow and the notes of a song, none of Arturo and Emilyn's relatives look or sound alike. As the siblings run errands to help prepare for a very special day in their family, Emilyn tries to write the perfect poem to describe what it means to be in their big, loving family. With every stop, and taste of delicious treats along the way, the siblings begin to understand, each in their own way, that all the different parts of their family make them who they are.