Lily and Blue Kangaroo are inseparable. Whatever Lily does, Blue Kangaroo does too. But Lily is not always fair, and when she is naughty it is Blue Kangaroo who gets the blame. One day Lily is very bad indeed, and Blue Kangaroo is taken away from her and placed on a shelf downstairs until he learns to behave... But will he? In the middle of the night Blue Kangaroo hops down from the shelf, draws a special picture saying `sorry' and slips it under Lily's mum's door. Lily's Mum wants to know who drew the lovely picture. And Lily whispers, `It was you, Blue Kangaroo!'