the story takes place in china in 1941. during the reign of the wang puppet government, the military affairs bureau agent gu xiaomeng (played by xu lu) finally successfully entered the wang puppet government after unremitting efforts and disguise. eee。 the death of a senior japanese intelligence official furious japan. they believed that all this was planned and implemented by an underground party leader code-named "old ghost". in order to thoroughly investigate the matter and find out the old ghost, gu xiaomeng and li ningyu (played by wen yongshan), the leader of the bandit suppression team, wu zhiguo (played by yang youning), the commander-in-charge officer bai xiaonian (played by niu zifan), and jin shenghuo (played by zhang zhijian), the director of the military machinery department of the bandit suppression corps, and a group of five were locked up in qiuzhuang. the person in charge of interrogating them was wang tianxiang, the director of the special services office (played by yu ailei) and the japanese special services officer hirahara (played by zhou yiwei). if the old ghost cannot be found within the deadline, no one will survive.