A dealer in outsider art threatens the equilibrium of her middle-class in-laws in North Carolina. Madeline is a go-getting art gallery owner from Chicago, recently married to George, a near-perfect Southern beau. When Madeline needs to close a deal with a reclusive North Carolina artist, George introduces her to his family: prickly mother Peg, taciturn father Eugene, cranky brother Johnny, and Johnny's pregnant, childlike wife Ashley, who is awe-struck by her glamorous sister-in-law. Madeline's presence exposes the fragile family dynamics as hidden resentments and anxieties surface.