Jack is a scrappy fifteen year-old kid stuck in a run-down small town. Trapped in a violent feud with a cruel older bully and facing another bout of summer school, Jack's got all the problems he can handle. So when Jack's aunt falls ill and his runty younger cousin must stay with him for the weekend the last thing Jack wants to do is look after him.

Unfortunately no one really cares what Jack wants. Set over a hazy summer weekend, "King Jack" is a tough and tender coming of age story about friendship and finding happiness in rough surroundings.