Inhaling in life is easy. It’s the exhaling—the letting go—that’s the hard part. Katie Elliot has always known the Conner twins. For years she secretly pined after one, while playfully averting the advances of the other. Once upon a time, she was fine with that. Then came the moment when her twin of preference kissed her and changed everything. As if realizing love can be complex—even when it’s reciprocated—isn't hard enough, tragedy strikes, tearing Katie and the boy she’s always desired apart. Finding herself torn between love and guilt, Katie must learn when it’s acceptable to let go—when it’s finally okay to exhale.