What would happen if every grown-up in town fell asleep and the kids were left in charge? The most important tradition in tiny St. Polonius is the annual Tasting of the Sacred Bear Liver. Each citizen over twelve must eat one bite of liver to prevent the recurrence of the Great Hibernation, when the town founders fell asleep for months. This year is Jean Huddy's first time to taste the liver. It doesn't go well. A few hours later, all the adults fall into a sleep from which they cannot be woken, and the kids are left to run things. At first, they have a blast. But then the town bullies take over the mayor's office and the police force, and pretty soon Jean begins to suspect that this "hibernation" was actually engineered by someone in town.

Courage, teamwork, and scientific smarts unlock an unusual mystery in this delightful and funny story about one girl who inspires the kids around her to join together to save their home.