Twelve-year-old Hannah Steele doesn't mind babysitting after school. She just took a babysitting class, and her charges Zoe and Oscar are basically her next door neighbors, so it's really no big deal.

But then the shaking begins. Pottery topples. Furniture lurches across the floor. Glass shatters. The earthquake lasts four whole minutes. It knocks out the power. The stairs collapse. Phone lines are down, cell service is nonexistent. Even worse, the ferry and the bridge aren't running, so their parents can't get back to them. Which means, they're stranded and alone. With Hannah in charge…