Starting from that day, he walked into my life... It's the roaring twenties and thirties, and Shanghai is undergoing a rapid wave of westernization. The young master of a mafia family, Du Yinghong, encounters the street hooligan Shen Xiuhai. This fateful encounter changes the lives of both these young men. In these turbulent times, amidst complicated relationships, the two of them forge a true bond of selfless sacrifice. This is the story of a sincere friendship born during the tempestuous Republic Era.