When a group of bored teenage girls in Lance play at witches in the ancient stone circle known as the Lords and Ladies, little do they realise that they are opening up a gateway to a parasite universe. All of which might spoil the marriage celebrations of King Verence and Magrat were it not for the intervention of the indomitable and Granny Weatherwax, the uncouth Nanny Ogg, not to mention a parcel of mad Wizards, Cassanuner the dwarf romeo, and some very rude mechanicals with sticks and buckets.