Essentially a wrap-up to the TV show, TRANSFORMERS: THE MOVIE is set in the "future" year 2005. The good Autobots and their friends the Dinobots are in an ongoing war against evil Decepticons. When their planet fell to the Decepticons, the Autobots befriended humans and set up a base on Earth. Here the Decepticon warlord Megatron launches a sneak attack on Earth's Autobot city and longstanding Autobot hero Optimus Prime is killed. Before dying, he passes on to his successor a glittery doo-dad called the Matrix that's supposed to be really important. Meanwhile, a new menace comes along, a robot called Unicron, a planet-sized machine that destroys and eats other planets. The only thing posing a threat to Unicron is the Matrix, so the monstrous robot gives the damaged Megatron an upgrade to capture it.