Abby discovers that this new reality is the result of a cosmic collision of parallel universes that has Abby living an alternate version of her life. And not only that: Abby's life changes every time her parallel self makes a new choice. Meanwhile, her parallel is living out Abby's senior year of high school and falling for someone Abby's never even met. As she struggles to navigate her ever-shifting existence, forced to live out the consequences of a path she didn't choose, Abby must let go of the Plan and learn to focus on the present, without losing sight of who she is, the boy who might just be her soul mate, and the destiny that's finally within reach.