You are a simple village lad who works for the local miller in a small village in middle ages England. There have been some strange things happening in the village and the villagers have put this down to witchcraft. As they need a scapegoat, they have accused you of being the witch. You have protested your innocence, so they have given you a reprieve. If you can find the identity of the real witch by midday, they won't burn you at the stake.
Notes
This was published by Melbourne House in Writing adventure games on the Amstrad CPC 464/CPC 664, design pp. 91-129, listing pp. 131-154. The book develops an adventure authoring system called Adventure Kernel System (AKS). Witch Hunt is an example adventure written using this system. Both AKS and the example adventure are in BASIC, so it is dismally slow.
The book can be downloaded as a pdf file from Simon Price's web site here. A disk image with the AKS and example adventure can be downloaded here.