Jet is a 19-year-old skag, one of the humans still living free on Earth following an invasion of creatures called the Nirreth. Squatting in the ruins of Vancouver, Jet and her family eke out an existence underground, hiding from the culler ships. No one knows where the ships take the people they abduct, but they never return. When a culler finds Jet, she may discover the truth the hard way...and end up living among the very creatures that have enslaved her.
Between bouts of babysitting a nine-year-old alien with a sometimes - dangerous crush on her, Jet spends her days training for the Rings, the televised Nirreth obsession that involves watching humans navigate perilous courses filled with both real and virtual enemies. As Jet is the first female human ever to run in the Rings, everyone fully expects her to die in the first round... or at the very least, to do so poorly that the judges, the infamous Rings Board, will kick her out even if she survives.