And the Lord came down to see the city and the tower, which the children of men builded.   Go to, let us go down, and there confound their language, that they may not understand one another's speech.   Therefore is the name of it called Babel...
•  Genesis 11

Set in Tokyo in the near future, the massive Tokyo Bay land reclamation plan - known as the Babylon Project - is well underway, and a colossal maritime maintenance platform, nicknamed "the Ark," now stands in the middle of the bay. One day, a man leaps to his death from the top of the Ark. His name: Ei'ichi Hoba, the brilliant programmer who created the revolutionary HOS, or Hyper Operating System, which was rapidly adapted by nearly all "Labors" - 2-story-high, advanced machines used in construction. With such success, why would Hoba kill himself? Before a motive can be found, strange things begin to happen... One after another, dozens of Labors suddenly go destructively berserk, and it's up to the Metropolitan Police Labor Force's SV2 team to clean up the mess. Subtly prodded by Commander Gotoh, SV2 member Asuma Shinohara begins investigating these unprecedented acts of violence.

While painstakingly investigating a mystery, Asuma uncovers that HOS is Hoba's Trojan Horse - a lethal virus code that will caused all 8,000 existing Labors to go berserk en masse, resulting in the total devastation of Tokyo. Asuma also suspects that Hoba committed suicide to protect something. Why else would he kill himself at the Ark?   Can the SV2 team wrestle themselves - and all of Tokyo - free from Hoba's nefarious trap?