When the three sons of a dead octogenarian paid a routine visit to his grave, they were shocked to discover a mysterious letter, not only mentioning his assets and life experiences, but also containing his signature. Nabil, the eldest son of the deceased, picked up the envelope containing the letter, his hands trembling, and his mind speculating about its source. Could it be from their dead father? Could someone, connected to their father, have brought it to the grave for some ulterior motives? Nabil and his brothers didn't know that the shock they had at that time was just a drop in the bucket compared to what would come later. The letter, among others, requested the family of the deceased to publicize the contents of a document revealing his experiences on what matters most in the lives of human beings.