What will it take for a cynical older sister to realize she's a born accordion player -- with music in her heart?

Eugenia Lincoln is a practical person with no time for gee-gaws, whoop-de-whoops, or frivolity. When an unexpected package containing an accordion arrives at her house, she is determined to have nothing to do with it. But her plans to sell the accordion, destroy the accordion, and give the accordion away all end in frustration. How can Eugenia stop being tormented by this troublesome package? Might she discover that a bit of unforeseen frivolity could be surprisingly . . . joyous?