Wayne becomes concerned about his family's safety and invents a security system for their protection. F.R.A.N. (Petrea Burchard), the Felon Repeller and Accident Neutralizer takes her duties very seriously and involves herself in every facet of the household. Diane is wary of the overprotective computer, not realizing that F.R.A.N. has developed a mind of her own. When Wayne decides to pull the plug, F.R.A.N. holds the Szalinskis under "house arrest." Wayne and his family try to stop F.R.A.N. before it's too late.