After the fall of civilization, a new society named, "Nimbus" formed behind a giant steel wall within the depths of a forest. Abiding by one law, known as Separation, Nimbus aimed to be different than the world it left behind. In this world, when kids turn 14, they're sent outside the wall to survive for 11 years on their own. Nimbus follows the stories of Sam, Elise, and Sean. Each a different age. Each with a different path. Will they survive their 11 years or will they all succumb to the dangers lurking outside the walls of Nimbus?