The exact nature of our wrongs

"On a summer evening in the blue-collar town of Amicus, Kansas, the Campbell family gathers for a birthday dinner for their ailing patriarch, retired judge Abel Campbell, prepared and hosted by their still-hale mother Hattie. But when Billy, the youngest sibling--with a history of addiction, grand ideas, and misdemeanors--passes out in his devil's food cake, the family takes up the unfinished business of Billy's sobriety. Billy's wayward adventur...