When English schoolboy Jamie meets a grimy, one-eyed old man who seems set on stealing other people's hamburgers, he isn't sure what to think. Before long, the old man - Grimm - is telling Jamie fantastic stories: he claims to have been present in the days of ancient English heroes such as Beowulf, Hengest, and King Arthur Is Grimm just a deluded old man - perhaps Jamie's mysterious Uncle Albert? Or could he possibly be telling the truth?