In Xinchu City in the south of the Yangtze River, Song Xiaoyan, the originally peaceful businesswoman's daughter, was unexpectedly involved in a family crisis. In order to prove her innocence, she met like-minded people Bai Jinyu, Liu Qingqiu and Qin Xiaoman. From strangers to deceased best friends, they solved the mystery while pursuing their ideals. The story spans the south of the Yangtze River, the capital, the frontiers and even foreign lands. Under layers of crises and power struggles, they open a new door to life with wisdom and sincerity, and there is no shortage of tears in the humor. In the end, the four heroines each established their own careers and jointly wrote a glorious chapter for women in turbulent times.