Lily is nine. Her sister Daisy is one, and she's no ordinary baby. Somehow, when she was born, something went rather wrong - and now Daisy is a Witch Baby. Nobody knows this but Lily - she's the only one who can see when Daisy makes the fridge float in the air, or turns people into slugs, or summons up her very stinky dog Waywoof

It's Halloween and Daisy and Lily are all dressed up to go trick-or-treating. Lily just wants to get the best candy, but with Daisy the Witch Baby on the loose, it's sure to be anything but aquiet night."

Mum is trying to potty train Witch Baby Daisy, unaware that as soon as she succeeds, Daisy will be reclaimed by the witches who live on the hill, who've only been waiting for their little protegee to be out of nappies before they take her 'home'.