Sisterhood

Gu Bingxun died tragically, and the sisters of the Gu family turned against each other. Sister Gu Yuzhi reluctantly committed herself to the brutal struggle on charges of unfilial piety, while sister Gu Yuqian became a KMT military reunification agent. The communication equipment sent by the Chongqing underground party to Yan'an was repeatedly intercepted by enemy agents. Gu Yuzhi personally sent the equipment to Yan'an in the name of sending his deceased father's body back to Shaanxi. Unexpectedly, the two sisters appeared on the plane at the same time. Gu Yuzhi calmly and tactfully transferred the equipment, causing Yu Yating who was waiting at Xi'an Airport to escape. The enemy sent traitors to follow Xi'an to carry out sabotage. After discovering the whereabouts of the traitor Wu Zhang, Gu Yuzhi attacked Wu Zhang at night and fell into a tight siege. Fortunately, he was rescued by the Gu family's personal bodyguard Huang Zinong and escaped from danger. Yu Yating led his men disguised as bandits and robbed the radio equipment. Just as they were toasting to celebrate, Gu Yuzhi came back and snatched away the equipment. When they were about to enter the liberated area, a jeep blocked the front, and they fought hand to hand. When the smoke cleared, sisters Yuzhi and Yuqian faced off. Suddenly, two black and cold gun barrels were aimed at them at the same time. Yuqian finally understood that Huang Zinong was the enemy who killed her father, and Yuzhi also regretted that she could not see through the identity of the military commander around her in time. The gun rang out, Yuqian fell, but Huang Zinong fell at the feet of Yuzhi. It turns out that Zhang Ruoyu, who assisted Yu Yating and Gu Yuqian in intercepting the equipment, was the one who broke into the enemy's heart.