In the town of Hilltopger, everything goes on as usual: in the Black cat pub, rockers sing until they are hoarse, break guitar strings to punk rock and lose microphones in the heat of excitement; in the White cat bakery they peacefully drink tea, munching on rosy croissants to the tunes of French chanson. But everything changes when one hermit scientist, a medieval time traveler, accidentally summons the evil spirit of a witch named Frieda in his van...