Taking place in the 23rd century, Mighty Orbots follows the exploits of Rob Simmons, a scientist, and his robots (known as Orbots)—Tur, Bort, Beau, Crunch, and Ono—who are all members of the Galactic Patrol, a futuristic police force based on Earth. The central focus of the series is their conflict with Shadow, a malevolent planet of evil whose ruler, Umbra, aims to dominate the universe.