The Wild Swans

Elise is the foster-daughter of the King of Arcainia, a mathematician, and the country’s treasurer. She is not a hero. But when her step-mother, a wicked witch, curses Elise’s seven foster-brothers—the princes of Arcainia—and turns them into swans, Elise is the only one who can save them.

To break the curse, she must knit seven shirts made of stinging nettles, but there’s a catch. She has to complete the shirts without uttering a word, and if she doesn’t finish the task, Arcainia and her foster-brothers will be lost.