Lily knows better than to listen to the gossip her little brother, Henry, has heard, but when her school newspaper needs a big headline, the rumor that Bigfoot has been spotted is the best lead she's got. But when claw marks appear on the football equipment and excessive animal hair starts clogging-up the gym showers, Lily knows she can't be afraid. This is her opportunity to break the story wide-open. But can Lily, Henry, and Oliver, the neighbor-kid they're babysitting, discover what Bigfoot wants before it's too late?