Three graduating students drop their degree certificates, but each picks up the wrong ones off the floor. Keaton plays a botany student who, accidentally, picked up an electrical engineering degree and is invited to wire a home using many gadgets. The man who actually was the electrical engineer graduate exacts revenge by rewiring those gadgets to cause mayhem.
During the original scheduled shooting of the film in 1920, Keaton suffered a broken ankle 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.