Rudy Irving receives from his half-brother a key to a lockbox that contains his inheritance. Rudy discovers that Lockbox 436 holds letters from his father to him. Each letter details a moment in his father's life growing up in the Deep South with his grandfather, Augustus Irving. Augustus passes on to his grandson time-tested values and Southern wisdom that changes his life. These lessons also have an impact on Rudy, and he passes them on to his children. Learn what the letters from Lockbox 436 have to say that can change your life.