“after the september 18th incident, the japanese invaders built a military key called "oriental maginot line of defense" on the sino-soviet border. ccc。 anna, the adopted daughter of the soviet general, sneaked into northeast china and investigated the fortress, but was unfortunately captured by the japanese army. the northeast anti-japanese united army sent investigator wenlong to rescue anna. magician gao xiaozhuang, hunter hu dazhuang, female agent of the national army tan zhuoru, northeast army officer wei kunning and others participated in the rescue. after wenlong rescued anna from the tigerhead fortress, japanese officer koizumi kiyoshi led his troops to pursue him. wenlong originally planned to send anna out of the sino-soviet border in the northeast, but the japanese army blocked the border in advance, so wenlong changed his plan and decided to send anna to the pass. anna held photos recording the atrocities and confidentiality of the japanese army. in order to avoid leaks, the japanese army sent abe kuan to participate in the arrest. while escorting anna, wenlong led everyone to destroy a series of military facilities such as the japanese railway and drug factory, and found a large number of evidence of japanese invasion of china. in order to protect the evidence of the japanese army we have, hu dazhuang, tan zhuoru, wei kunning and others died one after another. after a desperate battle with the japanese army, anna was finally sent to a safe place