After a supernatural showdown with a serial killer, Evie O'Neill has outed herself as a Diviner. With her uncanny ability to read people's secrets, she's become a media darling. It seems like everyone's in love New York City's latest It Girl - their 'Sweetheart Seer'.

But while Evie is enjoying the high life, her fellow Diviners Henry DuBois and Ling Chan will fight to keep their powers secret.

A malevolent force is at large, infecting people's dreams and claiming victims in their sleep. At the edges of it all lurks a man in a stovepipe hat who has plans of nightmare proportions . . .

As the sickness spreads, can the Diviners descend into the dreamworld to save the city?