Fiona goes wild and violates multiple terms of her probation by partying with Robbie's degenerate friends. A search for her gets underway when she fails to contact anyone.

Season 4 ends with Sheila fighting for custody of the Native American kids and clashing with Sammi over where they will all live once Frank is released. Meanwhile, Fiona passes a drug test, gets released from jail and lands a job at Patsy's Pies with the help of her parole officer; and Frank begins to feel again like his old, troubled self.