beverly the main character's friend has built a house in Wales and invites the main character Giles Hampton to spend a few days there. Giles goes happily, and one day he decides to go to a trip to climb the mountains and hills because he loves the geology, but the weather is really bad and there is a very thick fog, Giles get lost. A man that speaks Welsh appears through the fog and he's got a map to return to house, he give it to Giles, the map looks very old. Giles follow the map but the map lead him to a cliff, he nearly fell down to it, but finally Beverly's servant find him. When he go home he tell Beverly about what happened than his servant and Giles discover that the mysterious man that helped Hampton to return home was Madog ap Rhys, dead in the 1720, and the map is from a long time ago too, when there is no cliff. There are many stories about the man who'helped' Giles, it say that he always help the travelers who get lost in that forest. But he was already dead a long times ago, the guy who helped Giles is the ghost!