Beowulf heard stories of a monster known as Grendel, who was hunting the warriors of Heorot. Over 12 years, Grendel killed more than 30 of the king Hrothgars men. The people needed a hero of epic powers, so they called Beowulf.
(No Refusal) Beowulf could not refuse to help King Hrothgar, so he gathered his best men and set off for denmark.
King Hrothgar becomes Beowulfs mentor, though his influence is not seen at first. Beowulf uses the problem with Grendel as a lesson for when he bcomes king. Beowulf learns that a king that cannot fight is useless to its people.
Beowulf and his men cross the sea from Geatland to Denmark
Beowulf battles Grendel, and outsmarts the monster; he takes Grendels arm as a trophy, mortally wounding him.