In a world where society has crumbled, advance scientist have chosen groups of teenagers to rebuild it. They pare up a male and female as partners, and they are chosen to spend the rest of their lives together rebuilding the city

The pairs can be chosen for four things. Building, manual labor in order to make houses. Growing, growing food. Caring, talking care of children and learning about house skills. And remaking, having kids. Which the teens thought was the worst