It all begins on a Monday, when four people board an elevator in a Manhattan office tower. Each presses a button for their floor, but the elevator proceeds, non-stop, to the top. Once there, it stops for a few seconds, and then plummets. Right to the bottom of the shaft. It appears to be a horrific, random tragedy. But then, on Tuesday, it happens again, in a different Manhattan skyscraper. And when Wednesday brings yet another high-rise catastrophe, one of the most vertical cities in the world --- and the nation’s capital of media, finance and entertainment --- is plunged into chaos. Who is behind this? Why are they doing it? What do these deadly acts of sabotage have to do with the fingerless body found on the High Line?