One change between the book and the movie is that Beowulf does not go home. In the film he stays in the land of the Danes. This is because king Hrothgar commits suicide and leaves all of his belongings including the queen to Beowulf. Also Grendel’s mother defeats all of Beowulf’s army in the night. When Beowulf sets out to go and defeat Grendel’s mother he is overwhelmed by her beauty. This is yet another difference in the book Grendel's mother was a hideous creature but in the movie she is beautiful. She leads to the demise of Beowulf.

A major plot change in the movie occurs when Beowulf goes to kill Grendel’s mother. Instead of killing her he instead has a child with her. This is a big change to the story in the book this event does not occur. Their child is portrayed as a dragon a beast who is essentially all of Beowulf’s wrong doings. His wrong doing are manifested in the form of a dragon it’s like he is the cause of his own destruction. Beowulf’s son will ultimately be the demise of Beowulf at the end of the 2007 movie adaptation.