Hroghthar tells Beowulf that Grendel has a mother that has killed some of his closest companions. He goes on to describe the hellish lake where she lives. It’s described as a lake of fire.
Once Beoqulf gets to the lake, he tells his men not to wait up for him if he doesn't get back. He then swims through the lake for hours trying to get to the bottom searching for Grendel's mother.
Beowulf is nearly killed by the Sea witch. In order to kill her Beowulf grabs the sword off the wall and pierces her neck.
After Beowulf kills the mother he finds Grendel's dead body and slices the head off,entire lake turns red of blood. Hrothgar's men thought the blood was that of Beowulf and that she had killed him down there.
After hearing of a dragon that has now come to scare and kill the people of Geatland, Beowulf, a once young handsome warrior, now an old ruler decides to go into battle one last time to slay the dragon.
Beowulf must go into battle with the dragon because the dragon is burning the villages down. The dragon is making Beowulf’s entire kingdom go into fear by burning down houses each night.