There was a 12 year old boy who went to the library with his mom

While he was there, he discovered the centipede. This centipede looked normal, but was just bigger in size (not monster big though). The boy tried telling his mom about how much it bothered him, but his mom couldn't give a crap and told him to ignore it

Later on, the boy's dad went out searching for the centipede, then died after the centipede attacked him. Apparently, this centipede attacks lonely people lol

Then, the boy entered his room and saw his cat (who looked a lot like Shadow) on the top bunk of his bunk bed. He wanted to pet the cat, so he reached up to reach it. Unfortunately, the centipede was on the bed as well and gave the boy a little scratch

Terrified for his life, the boy told his mom, and the two of them fled the house to go get some help from the boy's past friends

As a filler, there was a pool scene filled with girls in bikinis for absolutely no reason

After all that, we cut to the finale, where the boy and a girl his age (either a friend or a romantic interest) simultaneously stomp on the centipede, ultimately killing it