A prequel series to the number-one manga bestseller. Humanity has learned to live in complacency behind its high walls, protected from the giant Titans. But when a Titan-worshipping cult opens one of the gates, a Titan wreaks havoc, consuming the cultists. After the rampage is over, two young Survey Corps members are shocked to discover a pregnant woman's partially digested corpse—with her baby still alive inside it! What will the fate of this child of the Titans be? And how will humanity learn to cope with the Titan threat?
Fifteen years ago, humanity led a lastditch attempt to discover the Titans’ weakness – a survey expedition to capture one of the beasts. But the tenmeter Titan who appeared during the capture attempt threw the expedition into chaos. Among those who escaped behind Wall Maria was the genius craftsman Angel, a weapondeveloper who was participating in the expedition as a researcher. What would he conjure up from this failure?