Hunted nearly to extinction by monstrous humanoid creatures known as "Titans," humanity sought refuge by hiding inside walled cities. However, as centuries passed, ignorance settled over the masses, who forgot the Titan threat and grew perfectly content living within their fortresses. Angel Aaltonen is no exception until, after witnessing the Titans' devastation firsthand, he begins to realize how fragile mankind's safe haven truly is. Determined to protect his friends from the danger, the craftsman sets out to create a device powerful enough to fight the Titans. Over a decade later, Kuklo—who was discovered in Titan vomit as a baby and subsequently dubbed the "Titan's son"—finds himself freed from the cage that has held him since infancy. Aware that his life is now in his own hands, the boy soon finds a reason to live: to meet a Titan face to face and understand why humans have only ever seen him as an object of fear. Thus, Kuklo decides to join the Survey Corps, unaware that he may be the person the stagnant military unit has been looking for. Shingeki no Kyojin: Before the Fall tells two separate yet connected tales which detail humanity's struggle, loss, and determination to transcend the role of helpless prey and strike back against the Titans.