Beowulf the bravest sole around is getting ready to sail across the sea to the land of Danes to fight the demon Grendel.
Grendel sneeks into the town and kills mutliple people until meeting Beowulf. Beowulf grabs his arm and pulls it out of its socket which later kills the monster.
As Beowulf sleeps the next night after a big feast for killing Grendel. Grendel's Mother comes into Herot and kills the kings bestfriend.
Beowulf end up following Grendel's Mothers trail back to here house that is hundreds of feet at the bottom of a dark spooky swamp.
Beowulf swims to the bottom like no other man can and he starts searching through the dark cave looking for Mother Grendel.
He finds mother Grendel and smash after smash the both are killing each other. But then Beowulf grabs a sword and kills Grendels Mother. He sees Grendels body and cuts of his head to bring back to the city.