The Chumscrubber is a dark comedy about the lives of people who live in upper-class suburbia. It all begins when Dean Stiffle (Jamie Bell) finds the body of his friend, Troy. He doesn't bother telling any of the adults because he knows they won't care. Everyone in town is too self consumed to worry about anything else than themselves. And everybody is on some form of drug just to get themselves through the day.

After Troy's death, local drug dealers (Camilla Belle, Justin Chatwin, Lou Taylor Pucci) at the school run out of their stash. They threaten to kill Dean's brother unless he get Troy's stash for them, however it turns out that they kidnapped the wrong kid!