Dickie is so convinced that a new Rob Reiner movie in the works, Mr. Blake's Backyard, is his comeback vehicle, not even his agent's (Jon Lovitz) inability to get him an audition deters him. He pesters Tom Arnold at an Alcoholics Anonymous meeting to hook him up with Reiner. After he is kicked out because he's not an alcoholic, Dickie fakes being wasted and crashes what turns out to be a Lamaze class. However, at the class is Brendan Fraser (in an uncredited cameo appearance), who agrees to call Reiner for him.
Reiner bluntly tells Dickie that the part is not within his abilities because it requires knowing how a regular person lives. Unfortunately, he never had a real childhood, having grown up in the limelight, then being abandoned by his mother (Doris Roberts) when his show was canceled. Desperate to prove to Reiner that he's right for the part, he sells his raunchy autobiography to raise $20,000 to offer a family to "adopt" him for a month. As expected, once Dickie hires his "family," things do not go well as he tries to fit into the household.
Dickie learns much about himself, and life in general, and of course gets the part. Along the way, he helps the family's son get a date with his dream girl, and the daughter get on the pep squad. Nevertheless, the main lesson he learned is from Blake's Backyard itself: sometimes the things you want are in your own backyard. When his gold-digger girlfriend runs off with the self-centered father of his fake family, Dickie gives up the part to be with the family he has come to love.
The movie ends with a faux E! True Hollywood Story report on Dickie, who now turns his real story into a new sitcom that uses all of his old friends, as well as his new family (including the mother, whom he has married). The final scenes are a take-off on Relief albums, this one listed as "To help former child stars". The lyrics include such treats as The Brady Bunch's Maureen McCormick threatening to "bust the fucking head" of the next person who calls her "Marcia" and many in-jokes for fans of old TV sitcoms.
The movie shows Dickie interacting with numerous other fellow former child stars (played by over two dozen actual former stars lampooning their own careers, such as Leif Garrett, Barry Williams, Dustin Diamond and Danny Bonaduce).