Underground City arc

The Underground City arc is the fifth story arc of the Attack on Titan prequel series, Before the Fall.

Introduction
Having escaped the iron grip of her brother, Sharle learns the famed inventor Angel Aaltonen is possibly living in the infamous Underground City located in Stohess District. Determined to do whatever possible, Sharle travels there to try and find him. Will she be able to survive the harsh and dangerous world that lies beneath the ground?