What is the main conflict in The Quiet Game by Greg Iles?

THE QUIET GAME by Greg Iles is a novel revolving around attorney and author Penn Cage and his hometown of Natchez, Mississippi. Cage returns home with his daughter after the death of his wife to the home of his parents to rebuild their lives. Arriving in the sleepy town, Cage discovers blackmail and a murder from decades ago, tearing up the lives of those for whom he cares.