When Whetū's mother takes a job at a magician's house and farm, Whetū becomes the animal keeper, looking after some unusual animals and the magician's stage assistant – a troublesome white rabbit called Errant. Errant's been playing around with magic and done something he can't undo. Rather than face the magician, Errant disappears, and Whetū becomes the magician's new assistant, just in time for the royal performance. It all seems to be going well until Errant reappears, and Whetū must save the day – and the king.