Zheng Yaoxian, the military intelligence service's ace agent in Chongqing, is renowned for his cunning, quick wits, and ruthless nature. In truth, Zheng Yaoxian is the Communist agent "Kite," embedded within the military intelligence service. To ensure that "Kite" remained like a sharp blade thrust into the enemy's heart, ready to deal the Kuomintang a fatal blow at the most crucial moment, Zheng Yaoxian had no choice but to become the Sixth Brother of the military intelligence service, a man his own comrades all believed deserved to be killed. The sacrifice of his contact severed his ties with the organization. After liberation, he assumed the identity of Zhou Zhiqian, a former Kuomintang employee retained by the new government, and continued to provide the organization with vital intelligence in his own unique way.
