From the back of the book:
Set in a central Europe goodies with war, Grimm Tales throws the PCs into a nightmarish struggle between Jacob and Vilhelm Grimm! To save Europe from savage Ottoman Hordes, the characters journey to a small town in the Carpathian Mountains to retrieve a fabled magic mirror. But a desperate feud between two brothers shatters the characters' plans.
To capture the mirror, the characters must venture into a hellscape where childish fears come to life. It will take more than a trail of breadcrumbs to guide the characters to safety, but with the fate of Europe in their hands, they can't just sit in their tuffets doing nothing!