Talk about having a lousy day. While Zinnia's seventh grade classmates are celebrating the last day of school, she's cooped up in the vice principal's office, serving detention. Her offense? Yarn bombing a statue of the school mascot. And when Zinnia rushes home to commiserate with her older brother, Adam, who also happens to be her best friend, she's devastated to discover that he's left home with no explanation. Just when it looks like Zinnia's...