Willow Moss, the youngest and least powerful sister in a family of witches, has a magical ability for finding lost things - like keys, or socks, or spectacles.
Useful, but not exactly exciting... Then the most powerful witch in the world of Starfell turns up at Willow's door and asks for her help. A whole day - last Tuesday to be precise - has gone missing.
Completely. And without it the whole universe could unravel. Now Willow holds the fate of Starfell in her rather unremarkable hands...
Can she save the day - by finding the lost one?