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... 

Locked in desperate battle with the man-eating Titans, the Survey Corps gets closer than ever before to Eren's basement and unlocking the mysteries of their walled world. But to get there, they will have to make a terrible choice with life-altering consequences for every surviving human soldier...