Twins Josh and Emma Binkerton swore they'd never return to the Good Times Travel Agency. Only now, a terrible storm has driven them and their little sister, Libby, right through its doors. Worse, Libby's opened another of Julian T. Pettigrew's guidebooks, and the Binkertons find themselves hurtling back in time --- to the Viking Age. All seems fine, at first, as the children are welcomed by the locals. But they quickly realize that Viking life is not for the faint of heart: i