The story begins with Ben Cooper and his family struggling to get a grip on household chores, school and work. Ben is the family caretaker, something he took up after his mother died. Always busy taking care of his father, Nick, and younger sister, Angie, he has no time to be a kid, including favorite sport of playing basketball. When he sees that a Smart House is being given away, he enters the competition as often as he can. The Coopers wins the house (named Pat, an acronym for Personal Applied Technology), and is introduced to her creator, Sara Barnes.
Soon afterwards, Nick and Sara begin to date, which is something Ben does not approve of, because he's worried his mom is being erased from memory. Ben decides to reprogram Pat, which is dangerous because of Pat's learning capabilities. He wants to lighten up Pat and make her into a real mother-like figure.
Ben and Angie have a party while Nick and Sara are on a date. Pat helps them cover up the party so they wouldn't get punished by throwing all of the debris on the floor, where they are absorbed into nonexistence. But Nick finds a sweater belonging to Gwen Patroni, a girl and a crush of Ben's who was at the party. As Pat's personality begins to radically change into "the most responsible maternal figure in town", the family starts to resent her. Eventually, Pat appears as a 1950's housewife hologram and traps the family in the house, because she believes that the outside world is too dangerous and unpredictable. Sara tries to get back in to shut the house down and with Ben's help, she gets in through the newspaper chute, but becomes trapped with the rest. As they protest Pat's lockdown, she becomes a giantess and a tornado, taunting them with her own rendition of the "Hush, Little Baby" song. Ben is able to end the lockdown by declaring that Pat isn't real and will never be a human. Pat finally unlocks the doors and windows, freeing them. Sara is then able to reboot Pat back to her original personality.
However, it seems Pat retains a mischievous side; she added chocolate chips to pancakes Nick was making.
- Ryan Merriman as Ben Cooper
- Katey Sagal as Pat
- Kevin Kilner as Nick Cooper
- Katie Volding as Angie Cooper
- Jessica Steen as Sara Barnes
- Paul Linke as Tuttle
- Raquel Beaudene as Gwen Patroni
- Joshua Boyd as Ryan
- Emilio Borelli as Miles
- Jason Lansing as Johnny
- The Disney Animated short, Dragon Friend, was seen in the film by Angie Cooper.