Catweazle is casting spells in his secretive cave in ''the great forest'' and his chantings are overheard by the Normans who enter his cave and attempt to capture him for practicing witchcraft. Biting one of the soldiers he is able to escape into the forest complete with his ''familiar'' ''Touchwood''. He is chased by some other Norman soldiers and is trapped by them leaving him no option but to dive into the lake. He reappears in a small pond located at Hexworth Farm in 20th century England having flown through time 900 years into the future. Here the magic of his journey begins. Hiding himself in a barn at Hexworth Farm he soon meets up with Edward (aka Carrot) when he returns to the barn with farmhand Sam riding on the farm's tractor whose noise scares Catweazle. Carrott manages to hide Catweazle from his father despite the strong smell on Catweazle's clothes. Carrott promises to bring Catweazle food later in the evening and this is where the fun begins.

Catweazle is back. Inevitably the return of the 11th century wizard for a new series of 20th century adventures spells trouble. Especially for Cedric, the 12 year old son of Lord and Lady Collingford who finds the magician hiding in his bedroom.