The multiverse business is booming, but there's just one catch: no one can visit a world where their counterpart is still alive.

Enter Cara. Of the 382 realities that have been unlocked, Cara is dead in all but eight.

On this earth, however, she survived. Identified as an outlier, and a perfect candidate for multiverse travel, Cara is plucked from the wastelands and given a job and a comfortable apartment in the wealthy and walled-off Wiley City. Cara knows what it's like to feel hungry, and scared, so she's more than happy to reap the benefits of her new position. As long as she keeps her head down, she's on a sure path to citizenship and security for life.

But when one of her eight remaining doppelgngers dies under mysterious circumstances, Cara is plunged into a new world with an old secret. What she discovers will connect her past and future in ways she never could have imagined - and reveal her own role in a plot that endangers not just her world, but the entire multiverse.