Sun Mo, a gentle and humble undertaker in a funeral home, actually has a special ability - the 'eye of retrospect', which allows him to see fragments of the deceased's last three days of memory by touching the corpse. Three years ago, his sister disappeared mysteriously, and the police determined it to be suicide, but he saw impossible details from his sister's belongings. In order to find the truth, he changed his name to Sun Mo and sneaked into the underworld to collect clues as an undertaker. When he discovers that his sister's death is inextricably linked to the underworld boss "Iron Faced Buddha" Jin Ye, a chess game about power, betrayal and revenge quietly unfolds. Sun Mo paralyzed his opponents with a gentle appearance, used the memory fragments of each deceased person to piece together the truth, and caused a bloody storm in the underworld. But what he didn't know was that he had already stepped into a bigger trap - someone was waiting for him to reveal the final answer to the mystery.
