Ally Terhune O'Neill is hosting Thanksgiving dinner for the first time and has invited all her brothers and sisters to join her at their family home. She just never dreamed everyone would accept, since they haven't all been in the same room for 15 years. Despite her best efforts, chaos reigns supreme when extra guests, a pair of unflappable nuns, a few family secrets, a boozy, outspoken aunt, and some questionable legalities challenge Ally's perception of what a perfect Thanksgiving dinner ought to be.