The Deadly Gates have been opened. An exiled prince plots the return of trolls. Jacob "Feather" Moore is given an ancient book to read. It shows him where he can find Mandrake's Key, an artifact with the power to seal the portal. In a race for his life and the future of FourPosts, Feather is pursued through caverns, deserts and foreign cities. Lost, hungry and alone, he struggles to reach the Great Hollow and the gate it holds. His only hope lies in the visions given by a book called Finder's Tome.