In the early days of the Republic of China, Nancheng Major General Jiang Ye was investigating an arms smuggling case and found out about it after he met a song and dance hall singer. She looks weak, but her identity is a mystery. Fang Zhizhi used key information as a bargaining chip and proposed to marry Jiang Ye in cooperation. The two work together to solve the case in public, but their love gradually grows secretly. When Fang found out that he had blocked the gun to save Jiang Ye, the true identity of the leader of his "underground intelligence agency" and his long-standing secret love were finally revealed. Faced with a deeper opium smuggling conspiracy, the newlyweds decided to work together openly and secretly. He defended the mountains and rivers with an open gun, and she guarded the dark web to guard the dawn. They worked together to uncover the interlocking puzzles in troubled times, and jointly promised to protect their country and each other with the deepest love.
