This is the second book in the adventures of the four Gordon children and their friend Tom. This time Tom is more involved, when he flies to New York with his school orchestra to perform for charity. He meets a new friend called Georgina and they get caught up in a mystery, which involves several long distance emails to Tom's friends in Edinburgh for help. Exploring famous landmarks of New York, this is almost a game of hide and seek. Will they outwit the men who want to pull off a daring robbery? Is the Chinese business man newly moved to Edinburgh...a goodie or a baddie?