Sabine isn't like anyone else. For as long as she can remember, she's had two lives. Every twenty-four hours she 'Shifts', living each day twice. In one life, Sabine has everything: popular friends, expensive clothes, perfect grades, and the guy everyone wants. In the other, Sabine's family struggles with finances, and she and her friends are considered rebels. But then she meets Ethan. He's gorgeous, challenging, and he makes her feel like no one ever has before.

All Sabine really wants is the chance to live one life. When it seems like this might finally be possible, Sabine begins a series of dangerous experiments to achieve her goal. But is she willing to risk everything-including the one person who might actually believe her?