The Partridge family discovers that during the night, someone has entered their house and burglarized their TV, radio, and stereo. As a gift, Reuben has a burglar alarm installed in the Partridge home. It has sensor pads in various places under the carpeting -- one step on a sensor and the house is filled with a heart-stopping, loud, clanging bell. While the Partridges are trying to adjust to the alarm and remember to turn it off when they are in the house, the neighbors are getting more furious each time it is set off accidentally. Petitions are being signed asking that the alarm be removed.