Señora Filomena goes out for a walk, in her Sunday best and a new hat that everyone admires. But the wind begins to blow and Filomena's hat flies off, much to her dismay. So begins the journey of this elegant and volatile hat, which on its way meets a family of mice that makes their home in its crown: kitchen and the living room downstairs; upstairs, a bed, with a springy mattress. But the wind blows again, and the beautiful hat takes off ... even further away! What other characters will it meet on its travels?