The Yan family is a prominent family in Shanghai. The eldest son of the Yan family inherited the family business. The second son is the deputy director of the Shanghai Detective Department and the third son is studying in France. The struggle between the Kuomintang and the Communist Party, the invasion of Japanese invaders, commercial battles, and many doubts... The story will revolve around the three brothers, whether they are sad or happy, worried or happy, please pay attention to this article.