Sammy thought she'd seen all the weirdness her town had to offer—and then she met Justice Jack, Santa Martina's very own superhero. Well, really he's just a guy in spandex and a mask who rides around town on a dirt bike, hoping to find some crime to fight.<br><br>The old folks in town think he's wonderful. So wonderful that they've asked him to track down Sammy's neighbor Mrs. Wedgewood, who seems to have disappeared—along with a lot of other people's cash. Sammy's friends think Justice Jack is funny and cool. Billy Pratt's even auditioning to be his sidekick! But Sammy thinks he's kind of . . . lame. He's more of a showstopper than a crime stopper. And when a real mystery comes along, Sammy finds herself right in the middle of it. . . .