What's left of mankind has hidden in a giant, three-walled city, trapped in fear of these bizarre, giant humanoids known as the Titans. Little is known about where they came from or why they are bent on consuming humankind, but the sudden appearance of an enormous Titan is about to change everything... 

With no combat gear and Wall Rose breached, the 104th scrambles to evacuate the villages in the Titans' path. On their way to the safety of Wall Sheena, they decide to spend the night in Utgart Castle. But their sanctuary becomes a slaughterhouse when they discover that, for some reason, these Titans attack at night