On the surface, Rosalind Ling Geraghty and Benjamin Burns are completely different. Aspiring rocket scientist Ro normally has a plan for everything. Yet she’s reeling from her unexpected dad’s death, and all she has left of him is an half-built model rocket and a crater-sized grief that she doesn't know how to cope with. Artist Benji loves superheroes and comic books. In fact, he's convinced his long-lost dad, who walked out on his family years ago, created his favorite comic, Spacebound-- but has no way to reach him.
Ro and Benji were only supposed to be science class partners. But when ra mix-up turns the unlikely pair into friends, Benji helps Ro build her rocket, and Ro helps Benji search through his comics--and across the country-- to find out where his dad truly could be.
As the two face bullying, loss, and their own differences, Benji and Ro try to piece together clues to some of the biggest questions in the universe.