Eight-year-old Anna has had a very bad day at school; in fact, it couldn't have gone any worse. She's let herself down, and more importantly, she's let her mum down. She feels awful about it. To get rid of her anger and sadness, she goes for a run, a run so magical that her bad feelings disappear . . . She discovers a secret world, just a rainbow ride away, filled with strange but friendly creatures. There are ants that you can ride on, moles that take you on safe underground trains, and creams that stop you feeling angry. It's a safe and wonderful world full of calm and happy creatures. It's just what she needs. But the wicked Queen of Fury is out to destroy it, as she gets all her evil power from children's anger. Can Anna and her friend, Philip, keep calm enough to keep Queen of Fury away or will their anger get the better of them?