After a lightning bolt zaps a robot named Number 5, the lovable machine starts to think he's human and escapes the lab. Hot on his trail is his designer, Newton, who hopes to get to Number 5 before the military does. In the meantime, a spunky animal lover mistakes the robot for an alien and takes him in, teaching her new guest about life on Earth.
Los Angeles, California. Officer Murphy, a veteran Metropolitan Police helicopter pilot suffering from severe trauma due to his harsh experiences during the Vietnam War, and Lymangood, his resourceful new partner, are tasked with testing an advanced and heavily armed experimental chopper known as Blue Thunder.