"Beowulf" is an Old English epic poem that tells the story of the eponymous hero, a Geatish warrior who comes to the aid of Hrothgar, the king of the Danes, whose mead hall is under attack by a monster known as Grendel. Beowulf fights and defeats Grendel and his mother, earning the gratitude and friendship of Hrothgar. Later in his life, Beowulf becomes king of the Geats and faces his final battle with a deadly dragon. The poem explores themes of heroism, fate, and mortality, and is considered one of the most important works of Old English literature.