In the old English story about Beowulf, we learn that a monster named Grendel is threatening the people of Denmark and killing some every night. When Beowulf of Geatland hears of this, he took a group of friends (crew) to Denmark to fight Grendel and rescue the people of Denmark.
Ultimately he is able to defeat Grendel after which he had to fight Grendel's mother as well. Upon killing her, peace returned to Denmark and Beowulf returned to Geatland where he eventually became king.
