In this sequel to Jennifer Laidlaw's The Adventures of Arno and Sophie, a year has passed since Arno and Sophie left Scotland to go and live in the south of France. Although they love it there, Sophie is missing her friends back in the Scottish village of Drumoig. They hatch a plan to return to Scotland for a holiday and celebrate Sophie's birthday at the same time. Their two cousins Zoe and Hugo decide to go with them.
Thus begins another adventure, as Arno plans a journey that will take them back to Scotland via a different route, flying over many towns and cities they have never visited. Top of the list is the capital of Scotland: Edinburgh.