Holly is going to spend two weeks in Edinburgh with her dad. He works on an oil rig in the Far East but is due back on leave.Her mum takes her to the station in Glasgow to put her on the train to Edinburgh, hoping to find a nice lady that Holly could travel with on the 45 minute journey. Then Holly spies someone she knows and waves to her. The woman is called Nina Nightingale and she writes books for children. She has just that afternoon given a talk to Holly's class. Holly's mum thinks that she would be an ideal person and, to Holly's horror, approaches her. Nina Nightingale does not like to refuse so they travel together, she and Holly, to Edinburgh, where a surprise awaits.
