A beautiful stranger has arrived in Owlchurch and soon wins over the entire village. Frodite is a magical-ointmaker and has the Horns of Pan - the highest award, granted by King Pan himself. But when strange things start to occur, Thomas and the twins begin to suspect that Frodite is not all that she seems. Determined to investigate, they set off on a dangerous journey through the forest to find the twins' wild father, the Green Man. Can he help them find answers?