In a setting where the multiverse is real, and travel between them can be manipulated, Katherine and Ethan must learn to navigate to these alternate realities to try to save their dying planet. Humanity is on a countdown towards extinction as climate change, pollution, and radiation have gone unchecked for decades, and it has taken its inevitable toll on their Earth-like planet and all of its inhabitants. The air has become unbreathable, the water undrinkable and mutants in all species have emerged.

Trained since they were children to connect with their genetic doubles they work for the corrupt rulers of their planet, the First Family, in the Jump Unit. Katherine and Ethan face many dangers within the multiverse and the outside world where they uncover secrets that the First Family would rather have remain hidden.