Rainbow has been looking for her younger sister, Jonna, for over a year-since the monsters appeared and the world began to dry up. 

With the fate of their family and possibly the whole world at stake, can Jonna and Rainbow rescue their dad, battle countless monsters, and tell each other how they really feel? Jonna and Rainbow are sisters,but that doesn't mean they're all that similar: Rainbow's the bookish one, Jonna is the whirlwind. Jonna's also incredibly strong and nearly invulnerablewhich will come in handy as they search the ruined, monster-infested wasteland that was once their home while looking for their missing father.

Jonna and Rainbow are sisters, but that doesn't mean they're all that similar: Rainbow's the bookish one, Jonna is the whirlwind. Jonna's also incredibly strong and nearly invulnerable-which will come in handy as they search the ruined, monster-infested wasteland that was once their home while looking for their missing father.