Teenager June must figure out how to exist in a world where she is the only one left with a heart--and whether she wants to keep hers at all. "Not that long ago, the Scientist discovered that all sadness, anxiety, and anger disappeared when you removed your heart. And that's all it took. Soon enough, the hospital had lines out the door--even though the procedure numbed the good feelings, too. Everyone did it. Everyone except high school student...