On Chinese Valentine's Day in Qinghe Town, Hepo, a six-hundred-year-old woman, fainted in the market after reading the memories of wronged souls. When she woke up, she was rescued by a young man with a mole at the corner of his eye. That mole is exactly the same as that of her stepbrother Chen Yanshu who protected her six hundred years ago.
There are many doubts about the death of the innocent soul Lin Wanwan, pointing to the Zhou family that has been in the town for hundreds of years. As an old woman and a young girl, He Po teamed up with a young man named Chen Muyun to investigate the case, which revealed an old grudge from six hundred years ago - the Zhou family framed Chen Yanshu and exiled her to Lingnan, and then pushed her into Qinghe to gain family fortune by killing the young girl.
He Po's identity, Chen Muyun's life experience, the grasshopper's token, the sweet-scented osmanthus cake's promise, all clues point to a fateful reunion. In order to save eight wronged souls, He Po burned her soul and was reincarnated, becoming the ignorant idiot He An'an.
Chen Muyun stayed by her side, from a young boy to a gentle shopkeeper, for ten years. He taught her how to read, took her to put river lanterns on the river, and opened a bookstore called "Duwo" for her.
When He Anan regained her six-hundred-year memory on a rainy night, she looked at the person in front of her and cried: "Brother, did I keep you waiting for a long time?"
"Soon, only six hundred years."
Intention: The river has finally forgotten all the secrets and only remembers one thing - when someone is waiting, someone will return.