Ten years ago, the explosion at Mount Avol sent the Lighthouse Company's glory to the grave with it. Babel Tower rose swiftly from the Lighthouse Company's remains, becoming a new corporate giant through its android technology and joining forces with the federal government to control District 25. Ten years later, a series of murders takes place in District 25. Senior Inspector Xu Yihang is ordered to investigate, only to find that all the evidence points in an impossible direction. Beneath the bloody crimes, undercurrents stir among numerous factions. Will the truth ever come to light? And what will become of Babel Tower and the androids?
