While investigating a series of earthquakes that hit along the eastern seaboard in one week, the Joes discover underground tunnels under a Virginia barn being constructed by Cobra with a massive drilling excavator which ends up separating Duke and Scarlett from the others. Like the roads of Ancient Rome, they figure out Cobra is building an underground network with Maglev rails that will allow them to move anything, anywhere, at any time without the public's knowledge making all roads lead to Cobra.