Lin Xi, a member of a dockside gang, finds himself unintentionally caught in an intelligence war between the Bureau of Investigation and Statistics (BIS) and Japanese invaders due to a key. Alongside his good friend Li Yunfei, they cross paths with Su Nan, a forward-thinking student, and Zhou Yingqun, an upright and principled BIS agent. As the enigma surrounding the key gradually unravels, it sets off clashes among gangs and sparks nationwide turmoil. Amid the turmoil, Lin Xi, Zhou Yingqun, and Li Yunfei form a profound brotherly bond, navigating through life-threatening scenarios. Lin Xi develops affection for Su Nan and embraces communist ideals. Seven years later, the scattered trio reunites in Jinzhou, and their status drastically alters. Driven by differing goals, they compete on the battleground of intelligence for their respective camps. With new grudges and old resentments, they grow opposing ideals. Amidst intelligence battles and gunfire, the trio calmly accepts their fates. They find peace in their choices, reconcile with each other, and unravel the enemy's schemes through blood and flesh, unyielding love and ideals. Ultimately, they steadfastly uphold their inner ideals and beliefs....

The five girls' days with each other were continuing, and more difficulties came one after another, but fortunately they knew each other well enough, and their feelings were increasingly deep, and they could support each other through these difficulties. While Ye Zhenzhen was infatuated with scientific research, she was also frequently affected by Dai Wei's family. How to live a simple life had become a problem, but fortunately her firm position was clear enough, and her family cared her very much, then finally she solved these difficulties. Fang Zhiheng accidentally had a sister, which made her change a lot, and gradually returned to the right track of life. Zhu Zhe accumulated through years of struggle, completely relying on her own in Shanghai, and finally broke through the bottleneck of the cause. After a detour, He Minhong left the 22nd floor and finally came back. She began to learn how to think, how to give, and how to get along with others. Yu Chuhui forced herself to work hard by external power, gradually moving towards consciousness, rising steadily, and getting rid of the shackles of her birth. The trials and gifts of life would continue, but with the support and companionship of the 22nd floor sisters, they could go forward and run all the way to happiness....

In the dynasties of the Nanbei, the world were in turmoil, and the "South Blade" Li Zheng established the forty-eight villages in Shuzhong to teach the martial arts and live here. However, after Li Zheng's death, famous people in the world have also successively failed. Years later, a young man who claimed to be Xie Yun accidentally rescued Li Zheng's granddaughter Zhou Fei from the Forty-eight Village. Half a year later, Zhou Fei and Xie Yun met again in Huojiabao, but were hunted down by two masters at Qisha Villa, and the two were involved in a conspiracy. Zhou Fei was instructed by his predecessors, always sharpening his swordsmanship, and relying on a brave to kill Qisha, rebellion, capture the king of the enemy, and rescue the refugees. Xie Yun accompanied Zhou Fei, the two went together, did not give up, and finally calmed down this turmoil. The generation of rookies, represented by Zhou Fei and Xie Yun, Xie Yun has grown into a true "bandit gentleman", and Zhou Fei has finally become a "South Blade" guru!...

Câu chuyện xoay quanh nhân vật Hoắc Ngôn. Sau khi Hoắc Ngôn tốt nghiệp Học viện Phòng Cháy Chữa Cháy, anh trở thành đội phó của đội cứu hỏa. Trong một lần giải cứu người phụ nữ mang thai khỏi xe taxi, anh đã tình cờ gặp được Yến Lam - một bác sĩ làm việc tại khoa Cấp cứu của bệnh viện. Cuộc gặp gỡ của họ từ lúc bắt đầu liên tục xảy ra những hiểu lầm, mâu thuẫn như một cặp oan gia. Hoắc Ngôn vốn luôn là người lạnh lùng, chừng mực, có bản lĩnh vững vàng trong mọi tình huống. Tuy nhiên, sự xuất hiện của Yến Lam đã trở thành nhân tố khó đoán như “mặt trời bé con” trong cuộc đời anh. Công việc của cả hai đều mang yếu tố vô cùng khắc nghiệt có thể hy sinh bất cứ lúc nào. Nhiều lần làm nhiệm vụ, cả hai suýt phải mất mạng, họ đối mặt với sự thật tàn khốc của tình huống khẩn cấp. Nhưng cũng vì thế mà tình cảm càng bền chặt hơn, không gì có thể chia cắt....