Dr. Richard Clayton (Ron Livingston) seems to be living the perfect idyllic life. He is a successful psychologist-turned-writer and his latest book on anger management is doing well. In addition, he is engaged to a beautiful and sexy Ellen (Neve Campbell). But one day his disgruntled and jealous brother Mitch spills the family's dirty laundry that he, Richard, is the adopted sibling of the family. Richie's snobbish uptight parents who are prominent country club members (Edward Hermann and Christine Baranski) concede that it is true. Feeling betrayed Richard decides to track down his birth parents expecting to find upper class educated people to justify his talent and success.
At Ellen's urging, he hires a detective to find them. Soon after, Frank (Danny DeVito) and Agnes Menure ~it's French~ (Kathy Bates) from Pekin arrive on the good doc's doorstep and announce that they are his true father and mother. It is a shock, as the Menures are traveling carnival trailer park folks who are the complete opposite of his adoptive parents and brawling country hicks. They eat meat while Richard prefers wheat gluten. They curse and have loud sex in the room next door. The scene where he hides in a closet and is privy to DeVito and Bates having sex on a bed, brought tears to my eyes. They're not anything like he imagined. Can he learn to accept them for who they are and love them unconditionally?
Kathy Bates and Danny Devito are a riot playing off each other while Beverly D'Angelo is almost unrecognizable as his tacky future mother-in-law.