The story follows the journey of a young man named Jax who is born into the Builder society. Jax is a talented engineer and is eventually chosen to become one of the Wall's Guardians, an elite group of soldiers responsible for protecting the Wall and the city from the Outlanders.
However, Jax soon discovers that the War Wall is more than just a protective barrier. It is also a symbol of the separation between the two factions and the deep-seated animosity that exists between them. As Jax begins to learn more about the origins of the wall and the history of the Builders and Outlanders, he starts to question everything he has been taught and must decide whether to remain loyal to his faction or challenge the status quo.