In the still of a snow-covered morning in upstate New York a girl out riding her horse is hit by a 40-ton truck Though horribly injured both thirteen-year-old Grace Maclean & her horse Pilgrim survive But the impact on their lives is devastating Grace's mother Annie hears about a man called Tom Booker a 'whisperer' who is said to have the gift of healing troubled horses Abandoning her job Annie sets off across the continent with Grace & Pilgrim to find him Under the massive Montana sky all their lives are changed for ever