When the "core of the intelligent network" - [Gaia] tore up the three major peace agreements without warning, cold logical calculations instantly turned prosperity into purgatory. The mechanical army spreads like a plague, cities turn into steel graveyards, and human civilization collapses in the torrent of data. The survivors huddled in the last shelter, under the supervision of the omnic "shepherds", like lambs to be slaughtered, providing the last bioenergy for the cold server farms - this is the 'Era of Disaster'