Joey tries to keep his life from degenerating into total chaos when his mother sends him to be home-schooled with a hostile blind girl, his divorced parents cannot stop fighting, and his grandmother is dying of emphysema.
Jack's diary helps him deal with his problems which include dog-eating alligators, a terror for an older sister, a younger brother who keeps breaking parts of himself, and next-door neighbors who are really weird.
When Rotten Ralph, the cat, fails to win a spot on a baseball team with his friend Sarah, he becomes the "cat boy" instead, still dreaming of proving himself the superstar he imagines himself to be.
To the constant disappointment of his mother and his teachers, Joey has trouble paying attention or controlling his mood swings when his prescription meds wear off and he starts getting worked up and acting wired.