Beneath the pillows of a hospice, death is not an end, but a carefully orchestrated trial.
Chen Muzhi, a professor of Alzheimer's disease, buried clues before his memory faded and wrote a letter of confession in the name of the deceased, revealing a series of unsolved cases that had been sealed for twenty years.
When caregiver Lin Wan discovered that all the letters were written in the same handwriting and pointed to the first elderly person she took care of, she was forced to step into a game of crime and punishment that spanned time and space.
Every letter is a tombstone of memory, every chamomile is a stamp of truth, and the old man who always said "see you tomorrow" is executing the final justice beyond the grave.