A young immigrant forges a new life at the end of a climate-ravaged 21st century. Late in the 21st century, drought and wildfires prompt an exodus from southern Europe. When 12-year-old Caleb is separated from his mother during their trek north, he soon falls prey to traffickers. Enslaved in an enclave outside Manchester, the resourceful and determined Caleb never loses hope of bettering himself. After Caleb is befriended by a fellow victim of trafficking, another road opens. Hiding in the woodlands by day, guided by the stars at night, he begins a new journey, to escape to a better life, to meet someone he can trust and to find his family. For Caleb, only one thing is certain: making his way in the world will be far more difficult than his mother imagined.