Lindsey Morgan

Cordell Walker, a widower and father of two with his own moral code, returns home to Austin after being undercover for two years, only to discover there's harder work to be done at home.

100 years in the future, when the Earth has been abandoned due to radioactivity, the last surviving humans live on an ark orbiting the planet — but the ark won't last forever. So the repressive regime picks 100 expendable juvenile delinquents to send down to Earth to see if the planet is still habitable.

When a virus threatens to turn the now earth-dwelling friendly alien hybrids against humans, Captain Rose Corley must lead a team of elite mercenaries on a mission to the alien world in order to save what's left of humanity.