Some kinds of Heartbreak aren't temporary.Prima ballerina Anthem Fleet has lived her whole life by her parents' strict rules, never leaving the pristine North Side of Bedlam City. 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 their romance crashes down around them one terrible night. 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. Anthem soon realizes her new mechanical heart has left her with a strange and terrifying 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.