The four Gordon children go with their parents from London to visit Edinburgh, Scotland, where their father may possibly join an architectural firm. The purpose of the visit is to see if the family will enjoy living there. Staying at the Kilters Hotel, the children discover eleven photographs in a hollowed out Gideon bible. The photographs appear to be of famous landmarks in Edinburgh. The plot thickens when they see on the back of each photograph a clue in the shape of a poem. Who is the man with a finger missing? With the help of the internet and a new friend, will the children solve the clues in time and be able to possibly save lives as well as a famous landmark?