Agnes is a three hundred year old witch who lives in the present day Scarborough, a small town on the Yorkshire Coast, and who travels through time via a bricked up doorway in the cellar of her ancient home that she shares with Marmaduke, her unusual, one-eyed cat. When Agnes passes through the bricked up doorway she travels through time, when Marmaduke goes through the doorway he not only time travels but also changes into a large, one eyed, ginger haired mercenary, and Agnes' right hand man.In this their third novel Agnes finds herself pitted against an evil man and his black dogs whose mission to raise demons stretches through time and place. Helped by Marmaduke; Whitby John, her local publican; the garrison from Scarborough Castle; Boggles, North Yorkshires very own mythical "little men"; and a member of a Finnish death metal band, Agnes harnesses new technology with old witchcraft in her most deadly adventure yet.