The ex-planet Pluto - now classified a Dwarf Planet - takes revenge on the solar system for the insulting title.
True story: In the year 2006 scientists finally got around to setting rules for planets. They had to be a certain size, for example. Formerly the planet Pluto was considered a planet - but under these classifications, not any more. Pluto is now a "Dwarf Planet" and now carries the name 134340 Pluto of the Kuiper belt.
Logical conclusion: Obviously the planet feels pretty cranky about this. Like that ex-member of the Beatles who quit before they got famous, he's stewing on what he's now missing out on. No longer being invited to the "cool parties" hosted by the actual planets, Pluto has to hang on the outskirts in shame.
But there's only so much a dwarf planet can take before Pluto strikes back. Play the role of 134340 Pluto wielding a galactic baseball bat and whacking meteors into the other, snobbish, deserving planets. Right the wrongs. Revert justice. Take action. 134340 needs - you!