While demonstrating the latest in automated warriors, one of them (number 5), gets arbitrarily struck by lightning, hence "Short Circuit." It (he) escapes the compound and is befriended by a ditzy mobile caterer (Ally Sheedy.)
Here is how it goes:
She mistakes the robot for an alien.
He learns what it is to be alive.
Security wants it dismantled before it takes their place.
However we know "it just runs programs" (yah right)
Will Ally discover her mistake?
Will the robot escape.
Can they recover it before it blows something up?
Careful you may find yourself rooting for Johnny Five.