Struggling to cope with her father's death and a recent breakup, eighteen-year-old Aria's life becomes infinitely more complicated when she falls through the multiverse, and with the help of a poem, she discovers truths about herself as she journeys through different universes to find her way back home.

Aria Patel likes stability, certainty, predictability. It's why she's so into science. It's why she dumped her boyfriend before they went to different colleges because the odds were that something would go wrong, eventually. In a life that's already so chaotic, why obsess over complicated relationships and shadowy unknowns when the scientific method gives you direction and a straight path to avoid all the drama. But there's no avoiding anything when Aria finds herself suddenly falling through parallel universes and there's no formula that can save her. She can't explain why she's been waking up in a new reality almost every day, or why Rohan, and a poem from her English class, seem to be following her through every new life. As Aria desperately attempts to find a way home, she eventually ends up stuck in a parallel world very similar to her own. She cherishes this new version of her family, and she finds herself unable to deny the yearning she has for Rohan...but it's not her life or her Rohan. It belongs to another Aria, another girl, and unless Aria can get back home, she'll have taken this happiness away from someone else forever. And she may never find her own.