A Parasite escapes from it captivity and sneaks into a Garfield plushie and decides to stay in it and now has a goal of consuming stuff to grow since it helps is mutate into its different forms (like if it absorbs a good amount spiders it can grow spider legs)

But its main goal is to consume/absorb humans to gain more intelligence it also begins to take on Garfield's characteristics only a few to trick people

But one day he heads onto a college campus and starts consuming everyone but then see a student named Dillon who hates Garfield and anything related to it and sees him as easy pickings but Dillon isn't gonna go down easy.