Manhattan is home to a thousand-story supertower, a beacon of futuristic glamour and high-tech luxury... and to millions of people living scandalous, secretive lives. Leda is haunted by nightmares of what happened on the worst night of her life. Shes afraid the truth will get out - which is why she hires Watt, her very own hacker, to keep an eye on all of the witnesses for her. But what happens when their business relationship turns personal? When Rylin receives a scholarship to an elite upper-floor school, her life transforms overnight. But being here also means seeing the boy she loves: the one whose heart she broke, and who broke hers in return. Avery is grappling with the reality of her forbidden romance - is there anywhere in the world thats safe for them to be together? And then theres Calliope, the mysterious, bohemian beauty whos arrived in New York with a devious goal in mind - and too many secrets to count. Here in the Tower, no one is safe - because someone is watching their every move, someone with revenge in mind. After all, in a world of such dazzling heights, youre always only one step away from a devastating fall....