As a scholarship student at up-and-coming Manhattan prep school Davison High, Kay knows that it would be a mistake to listen to the anonymous letter in her locker instructing her to dye her hand blue. Of course, it would also be a mistake to pursue Zola Wolfe, the enigmatic redhead in her Calculus class. But by the time Kay realizes that both of these decisions have the potential to destroy much more than her chance at getting into Northwestern, she’s already told the Blue Hand Girls far too much.