When Buzz Lightyear loses his partner Warp Darkmatter in a confrontation with the Evil Emperor Zurg, he vows to never have another partner again. Unfortunately, when Zurg invades the Planet of the Little Green Men and takes control of their Uni-Mind (a mystical orb that enables Star Command’s worker LGMs, whose individual minds are useless, to form a combined intellect that keeps the base running), Buzz is forced to act. Aided by the unlikely combined efforts of the rookie Mira Nova, the janitor Booster, and the robot XR, the four attempt to thwart Zurg’s plan to enslave every free mind in the galaxy.