An undercover cop who invade a drug cartel led by a notorious Thai drug lord. In classic heroic bloodshed fashion, the two develop a bond of brotherhood.

In a period of economic reform, three men will push the boundaries to reach success. Song Yun Hui is a highly intelligent man who becomes a technician and builds a great foundation for his career. Despite his success, he finds himself struggling to advance in rank due to discrimination against his poor background. Like his brother-in-law Song Yun Hui, Lei Dong Bao is also from a poor background. However, despite being a poor, rural boy, with a lack of education, he becomes a well loved leader that others look up to. A third man, Yang Xun is on the road to becoming a self-made entrepreneur and thrives on finding business opportunities. During the hardships of China's economic reform, can these three men find success?

Wu You is as carefree as his name suggests. He is single and lives with his nearly 70-year-old mother Zhang Baoxia. He joins an organization called Sunshine Club and becomes a senior partner, but his mother suddenly falls ill.