Grand Central Terminal is the very centre of the city. It's also the sixth most visited tourist attraction in the world. From the world's largest Tiffany clock decorating the Forty-Second Street entrance to using electric trains since the early 1900s, Grand Central has been a symbol of beauty and innovation in New York City for more than 100 years. But "the world's loveliest station" is hiding more than just an underground train system, and in Terminal City Alex Cooper and Mike Chapman must contend with Grand Central's dark secrets as well as their own changing relationship.