What had changed him so drastically?

The bitter, withdrawn Adam Deerfield who returned to Sevenoaks was not the man Kate had known. Whatever had happened to him in these past four years?

Kate knew his going away had to do with his wife's death, though Adam refused to speak about it--the event so traumatic that his small daughter had not spoken a word since.

Why would no one tell her what had really happened then? Could her new found love for Adam help lay the ghost of his past?