The Sword fell into the hands of the political radical, Shusangzi (蜀桑子 or Sang Jing 桑凈). The main character Fu Ziche (輔子徹) is an eccentric young disciple of Mozi, and is also an expert in mechanical engineering, especially in the creation and manipulation of Jiguan Ren (機關人), man-sized mechanical golems powered by mystic energy. Jiguan Ren were originally developed for war, but their designs were hidden away for fear of being misused. Shusangzi had re-discovered this technology, and developed a large Jiguan army for his own ends. Upon learning of this, Mozi sent Fu Ziche to investigate, and if possible, to stop Shusangzi. On his quest, he encountered Wenjin (紋錦), the estranged daughter of Sang created with the aid of the power of the Vessel, and they eventually fell in love.