Doyle and Aimee, two Earthling students, are chosen to attend a high school in outer space (Aimee for being the #1 student, Doyle for being a failure) They befriend alien classmates and learn to get along with them, despite their differences.
At a big game, Doyle is knocked out, and wakes up 15 years later to find he has grown into a giant.
All the former Galaxy High students are on Earth and Beef's army has been ordered to destroy Doyle.