The series tells the story of Song Zhuowen, a Communist intelligence agent who infiltrates the Special Services Division of the puppet Manchurian police headquarters in Harbin. The division's chief, Guan Xue, mistakes him for the person who once saved her life. Cold-blooded and suspicious, Guan Xue forces Song Zhuowen to endure countless hardships before he earns her trust and that of Japanese officials. He then clears obstacles in the way of ultimate victory in the war.
