With their tribe decimated by human cruelty and stranded in the stars, Tenna and Krona labor beneath grief and rage. But so far from home, they can't afford the violence their people could wreak upon what's left of humanity, can't risk losing their only allies.

Struggling to cope with what their families did and what they could have done to prevent those travesties, Olivia and Ricardo must finally face the scars of their childhoods. Misplaced guilt and substance abuse mean they have to survive themselves in order to help the Regonians their families abducted.

But deep in the stars, the Drennar, advanced aliens who've been abducting humans for years, are changing, and it could spell doom or salvation for the remnants of humanity and Regonians alike. Can they learn to work together to face this new development? Or will their inner demons tear them apart?