Lily knows better than to listen to the rumors her little brother, Henry, has heard, but when her school newspaper needs a big headline, it's the only newsworthy lead Lily's got. The problem is that if Lily's going to break the story, she's going to have to get some evidence that this so-called showering yeti is really real. So when claw marks appear on the football equipment and animal hair starts clogging the team's showers, no one's happier than she is. But can Lily and Henry discover what exactly the Bigfoot wants in time?