The summer before the fall of Yanzhou.
Marshal Shen Yanqing took shelter from the rain in Gu's medicine hall and met Gu Wangshu, who was making medicine.
She treated him for two gunshot wounds, and he taught her how to ride a horse for three summers.
He said he would take her to the south to see the sea when there was no more fighting - he was from the north and had never seen the sea.
Later Yanzhou fell.
He became a reviled "lackey", wearing that black uniform, and the newspapers scolded him for being a thief and a father.
She went into exile in Jiangcheng and returned three years later as a doctor in Beicheng.
Reunion at Beicheng Railway Station.
Their eyes met, and the way she looked at him was colder than the winter in Beicheng.
She didn't know that every arrest warrant he approved was rigged.
He didn't know that it was a lie that she returned to Beicheng to practice medicine, but it was true that she took over the intelligence line.
They both hate each other.
They are all doing the same thing.
Later someone asked her what she regretted most in her life.
She said: "That year at the train station, he called my name. I didn't look back."
Snow has been falling in Beicheng for seven years. Where is the old friend?
