Some kinds of Heartbreak aren't temporary.High in her tower above Bedlam City, prima ballerina Anthem Fleet has lived her whole life by her parents' strict rules, never leaving the sparkling, pristine North Side. Until she meets Gavin. An artist from the dangerous South Side of town, Gavin is like no one Anthem has ever met—and she falls for him suddenly and completely.But Gavin's world is as dangerous as it is intoxicating, and their romance crashes down around them one terrible night when they are attacked on the South Side and Gavin is kidnapped. When she wakes in a dark, blood-soaked lab, Anthem has a jagged scar down her chest . . . and an experimental bionic heart ticking inside her.As Anthem will soon realize, her new mechanical heart didn't just save her life—it left her with a strange and terrifying new strength. A strength that she's going to need if she has any chance of rescuing Gavin and mending the scattered pieces of her broken heart.