Dweebish architect Miles Harding (Lenny Von Dohlen) is hopelessly in love with neighboring musician Madeline (Virginia Madsen). He soon learns that Madeline already has an ardent suitor: Harding's own computer (voiced by Harold and Maude star Bud Cort)! When the electronic device, nicknamed Edgar, begins composing love songs dedicated to Madeline, Harding passes the tunes off as his own. At this point, the envious Edgar really goes to town, taking over all the electrical appliances in Harding's house--and dangerously meddling in its owner's life.