The decades spanning story of two very different policemen who rise to power in Hong Kong during British rule, and end up at odds with both organised crime groups and the anti-corruption unit vowing to bring them down.

It tells the story of Wang Xiaoshi, a kind-hearted young man who traveled down the mountain and entered the arena for the first time. By chance, he met Bai Choufei, Wen Wen, Su Mengzhen, etc., and established a lifelong friendship with them. The story of brotherly loyalty, lingering red dust, and gradually growing from an ignorant teenager to a "hero" in the process.

The series is based on the romance novel of the same name, which is originally named Qin He Yi Kan (衾何以堪) by Mu Fu Sheng. The series revolves around the love story between Su Nianqin and Sang Wuyan, who go through difficulties and finally grab their happiness.

In the reign of Emperor Taizong (627—649), which was called the Prosperity of Zhenguan, former clothing maker An is framed and imprisoned. When she was in danger, she entrusts her young daughter Liu Li to an old friend in the palace. Liu Li grows up in the palace and becomes a medical officer, responsible for epidemic prevention.

Wang Xuan and Xiao Qi strike a deal for the sake of power. They marry first before falling in love and join hands to protect their homeland. She is a woman who is no less than any man while he rose from humble beginnings. The imperial family has become rotten to the core. The nobles are lavish with no regard for the people. Princess Wang Xuan and her childhood sweetheart, the third prince, become pawns of a prophecy that states, "to acquire thee is to obtain the world." Being pulled into the matters of the court, Wang Xuan is married off by her father to Xiao Qi who comes from a poor family. On the night of their wedding, Xiao Qi is forced to leave the capital. Wang Xuan is shamed and discouraged. The Helan Prince kidnaps Wang Xuan in order to seek revenge on Xiao Qi. The crisis they face becomes a blessing in disguise for the couple. Wang Xuan is moved and inspired by Xiao Qi's wish to bring peace and prosperity to the nation and they fall in love.

The drama is shot from the perspective of women and tells a story about finding light in the darkness and embracing hope in motherhood. Lin Xu Zhi is a woman who doesn’t have a past. She was adopted and is still scarred from being abandoned by her birth mother. She’s an elementary school teacher that realizes one of her female students is receiving abuse from her mother. Her maternal instincts kick in, and she impulsively decides to bring the girl into her own care. In caring for the young girl, named Xiao Ou, two broken souls find solace in each other.

This drama describes the life of Zhou Enlai, who serves as Premier of the People's Republic of China, from the founding of the Communist State in 1949 to 1976 until his death.