Indigo, having just recovered from a bout of illness, must return to school after missing an entire semester. Only his younger sister and loyal sidekick, Rose, knows why he's dreading it so much. As it turns out, the school bullies are eagerly awaiting Indigo's return so that they can pick up where they left off -- flushing his head in the toilet. But Indigo hasn't counted on meeting Tom, an American student who is staying with his grandmother in England for the year. With his couldn't-care-less attitude and rock-and-roll lifestyle, Tom becomes Indigo's ally, and together they work to take back the school.