With Fellowship of the Ring (first book in the Lord of the Ring Trilogy) J.R.R.Tolkien continues were The Hobbit ends. So far Frodo (the young nephew of Bilbo has inherited Bags End and all that goes with it. This includes a curtain ring and all of its problems too.
Learning that the ring is the ring of the dark lord and now that the dark lord is out to get it Frodo leaves the Shire to destroy the ring forever, with his best friend Sam and two others Merry and Pipen along for the journey. Not even a few days in to the said journey the encounter a corrupt human of long ago, a Ringwrath, and barley got away.