By 2015, Beijing will have built the world's longest network of operational subway lines. This film offers a rare glimpse behind the scenes of this massive project, showing how the city is managing to pull off a stunning feat of engineering in only a few short years. Faced with difficult geological terrain and the challenge of protecting Beijing's many historical sites, amongst a plethora of other problems, the city planners and engineers display visions and determination, and commitment to the cause of turning the Chinese capital into one of the world's most modern cities.