Keaton plays a botany student who is accidentally awarded an electrical engineering degree. He then attempts to wire a home using many gadgets. The man to whom the degree should have been awarded then exacts revenge by rewiring those gadgets to cause mayhem.
During the original scheduled shooting of the film in 1920, Keaton suffered a broken leg filming a sequence with the electric staircase. The project was shelved, and then re-done entirely. The known version today is actually the second version filmed; no copies of the original footage from 1920 are known to exist.
Buster Keaton [Public domain], via Wikimedia Commons