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.

When Stargirl's mother is hired as the costume designer on a movie, they relocate to L.A., where Stargirl quickly becomes involved with an eclectic assortment of characters.