This is Arnold. He is upset.
He used to be a happy cat that would stroll around Catland and not
have to go to school.
Then one day he got into a fight with the Cat King named Larry IV
because he decided he wanted to be a vegetarian.
Larry IV cast a curse on Arnold which smitted him to the shameful world
of human beings. This meant that Arnold had to go to school and act
like a normal teenage boy, even though he was far from normal. Arnold
could even grow a mustache!
As Arnold served his unfair sentence in the human world, he noticed
something strange about his teacher Mr. H. Ignoring the fact that
Mr. h was a Harvard graduate, he also emanated an aura of evil. Arnold
eventually realized that Mr. H hated cats and kept them prisoner in his
lab. He also realized that Mr. H was a robot clone that had three brothers.
Initially Arnold thought that Mr. H only imprisoned cats because he was a
weird person, but upon closer examination he realized that Mr. H had a device
that would transform cats into humans and imprison them in a state of mental
terror.
It is now Arnold's job to save his fellow felines from the evils of Mr. H
and to end this cruel and unusual form of torture. And hey, maybe if he
succeeds he'll be allowed to return to Catland.