When Billy Broccoli finds out he's got to demonstrate a special skill for a class contest, he thinks he's got it made. With his ghostly best friend, Hoover Porterhouse, by his side, Billy's got the competition in the bag. But when Billy lands a spot on the sixth-grade team, he starts spending more time with his new teammates than he does with Hoover. And the Hoover plays second fiddle to no one.