Before her mom's death, Haruhi was know as his shadow of her mom's boss. Now in her last year of high school, Haruhi finds events brings back her mom's boss into her life. However, the events that brought him back into her life threaten her very life and are the result of one of her mother's cases.

His tormented thoughts after the man that he looked up to for six years was murdered by the Half-Blood Prince. Six Book spoilers.