It begins on a Monday, when four people board an elevator in Manhattan. Each presses the button for their floor, but the elevator climbs, non-stop, to the top where it pauses for a few seconds, before dropping.

Right to the bottom of the shaft.

It appears to be a horrific, random tragedy. But then, on Tuesday, it happens again. And when Wednesday brings yet another catastrophe, New York, one of the most vertical cities in the world is plunged into chaos.

Clearly, this is anything but random. This is a cold, calculated bid to terrorize the city. And it's working. But what do these deadly acts of sabotage have to do with the fingerless body found on the High Line?

It will be a race against time for detectives Jerry Borque and Lois Delgado to find the answers before a deadly Friday night showdown.

Number 1 bestseller Linwood Barclay returns with a heart-stopping thriller which will do for elevators what Psycho did for showers and Jaws did for the beach...