Lin Shaotao, Zhou Yiming and Jia Kuan have been classmates since college. After more than ten years of ups and downs, they have now stepped into the threshold of forty years hand in hand. In this important transit station in life, they support each other in facing the challenges from career, feelings, friendship and other aspects. Lin Shaotao's wife Jian Ai was his junior sister in college, but now she has come to the day of divorce; Jia Kuan and his wife Liu Yingxia work in a multinational company. His wife is thriving, while Jia Kuan is just a small employee, and the relationship between the two is facing a turning point; Zhou Yiming, a middle-aged single noble, met Zhang Yahui, who is younger than him, which made his original life brighter, but the changes in Lin Shaotao and Jian Ai's relationship made Zhou Yiming waver in his relationship with Zhang Yahui. Lin Shaotao returned to VG by mistake, which was the starting point of his career, and Jian Ai was also invited to work in the company. Fate made them experience many things together in the same company, and re-understand and appreciate each other from another perspective. Jia Kuan survived the crisis of being optimized, but accidentally caused his wife to become pregnant. Jia Kuan finally chose to support his wife's career wholeheartedly and run their family together. Zhou Yiming's fake "ex-wife" returned to China to find him, hoping that he could play the role of a father to their daughter who had no blood relationship with him, and was misunderstood by Zhang Yahui. After the misunderstanding between the two was resolved, they agreed to meet again at the next intersection of life. After experiencing all kinds of things, the three people finally understood that in this booming era, forty is far from the age of lying down and bowing your head. Opportunities and challenges always exist. No matter what, you must maintain your passion for life.