Answer:

Title of the story: Beowulf

Characters:

Beowulf: a brave and heroic warrior from Geatland

Grendel: a monstrous and powerful creature who terrorizes the Danes

King Hrothgar: the king of the Danes who seeks Beowulf's help to defeat Grendel

Wiglaf: Beowulf's loyal thane and companion

Dragon: the final adversary Beowulf must face in his old age

Setting: The story takes place in Denmark and Sweden during the 6th century.

Exposition: Beowulf hears of the troubles in Denmark caused by the monster Grendel and sets out with a group of warriors to help King Hrothgar. Beowulf introduces himself to Hrothgar and offers to fight Grendel on his behalf.

Climax: Beowulf fights and defeats Grendel in a fierce battle. However, Grendel's mother seeks revenge and attacks the Danes. Beowulf journeys to her underwater lair and kills her too. Later in life, Beowulf faces his final adversary, a dragon, and defeats it, but is mortally wounded in the process.

Moral lesson: The story of Beowulf teaches the importance of bravery, loyalty, and heroism. It also illustrates the dangers of pride and the inevitability of mortality. Additionally, it highlights the importance of honor and the values of a society, as Beowulf's deeds are celebrated and remembered long after his death.