This is the sequel to the movie "Short Circuit" and relies heavily on having "Short Circuit" viewed first. In the original an experimental automated warier (complete with laser and Nuke) is stuck by lightning causing a short circuit and making robot number 5 (Johnny) alive.
This movie has several other subplots and some slapstick humor.
Strapped for cash, Ben Jahrvi, co-creator of Johnny 5, is pushed into the manufacturing business, making little Johnny replicas. This movie contains a love interest (Sandy), and economics. The action comes from when they leave Johnny (you guessed it) home alone. He is bamboozled by petty crooks, and abducted by ruthless people because someone wants the warehouse access.
So will Sandy and Ben get past they awkward stage? (Can Johnny help?)
Will Johnny Five be recovered?
Or will Number five lead his now life of crime?