How can the detectives keep landmarks and symbols of the city of San Francisco safe from a man who wants to cause world-wide financial chaos, or perhaps just have the world's most awesome train set? Devon and Jeremy traverse the Bay, helped by a new detective, in an attempt to stay one step ahead of their adversary. Can they chase down a magical object before it's used to make the Golden Gate Bridge disappear? And are there any long-term consequences to being shrunk to the size of a Lego action figure?