Willow's mother, Rosie, isn't like the other mums. She wears every colour of the rainbow, has midnight, feasts, and sends Willow to school covered in paint. Meanwhile, Rex is the sort of father who checks Willow's homework, has a rule for everything, and would never dream of playing in the dirt. Now Rosie and Rex live in different places, Willow knows her mum needs her even more. But Rosie's multicoloured way of looking at the world can be overwhelming. These days it feels like Rosie is spinning off her axis - and taking Willow with her. As if one day, Rosie might disappear for good. And what would happen to Willow then?