In the early years of the Republic of China, the exchange of children twenty years ago caused a love-hate entanglement between two pairs of lovers. The turbulent era was full of hatred between the country and the family. One was the persistent love between the strong and brave poor girl Yu Bingchun and the gangster Ming Jueyi, and the love-hate relationship between the young master Xu Ninglin. For them, it was a mixture of clear coffee + red bean cake = bitterness and sweetness. The other is the fatal love between the independent and optimistic college student Xu Ningle and the senior Yu Juefan who is studying in Japan, and the gentle and infatuated love of the young policeman. They belong to the "Jingle blown by the quiet wind", which seems calm but is actually turbulent. Will they all find their love in the end?