Di Ying, a modern forensic doctor, traveled back in time to the fifth year of Tiansheng's reign in the Northern Song Dynasty.
When he woke up, he was lying in the snow and was picked up by a widow who ran a bun shop and took her home. Before he had time to rejoice, he discovered that he was in big trouble - every time he examined a corpse, he could see the obsession of the deceased during his lifetime. And those innocent souls will haunt him from now on, causing him to fall asleep every night, unable to sleep peacefully.
The only exception is the small bun shop in the east of the city. The woman named Ah Ci never asked any questions and only served him a bowl of hot soup when he came back.
He thought this would be the rest of his life - doing autopsies for the county government during the day and going back to the bun shop to sleep at night. Until one day, a Luzhou candidate named Bao Zheng knocked on his door.
"Brother Di, you have to help me with this case."
Then came Gongsun Ce, then Zhan Zhao, the man later known as "Bao Qingtian". Together they solved the corpse-burning case in the Gongyuan, found out the truth about the civet cat's exchange for the prince, and stood at the top of Bianjing City to face the upcoming Night of Ten Thousand Souls.
But Di Ying knew that his real battlefield was not in the court.
Every night, outside every door, there stood those who had been waiting for him for a long time. And how long can A Ci's door be blocked?