Buster Keaton is graduating from college but the diplomas get switched so instead of a degree in botany, he is presented a degree in electrical engineering. Before he can explain the mix-up, the dean of the college hires him to re-wire his home while he and his family are away on a two-week vacation. Keaton takes the job and, through the help of a book called "Electricity Made Easy", he wires the dean's home with all sorts of wonderful new gadgets. Things go wrong when the true electrical engineer graduate sneaks into the dean's house and switches some wiring around.