Two sisters, Matty and Elena Bela, who live in the megacity of Seacouver, are orphaned when they are teenagers. Elena goes to work on one of the re-wilding crews, restoring lands once managed by humans but now being returned to more wild places. Matty stays in Seacouver where her every need is provided forâ€”but somehow that is not enough.
After a few years have passed, she decides to find her sister, but the outside world is not what she expectsâ€”it is rougher, and the bots dedicated to restoring the wilderness seem to have a more sinister purpose. As Matty struggles to find her sister and evade the bots, she uncovers a group of people with an agenda that may endanger Seacouver.
Matty must find her sisterâ€”and they must learn to trust each otherâ€”in order to discover the truth hidden behind the surface, and to save Seacouver.