Finally reaching the Lonely Mountain, Thorin and the Dwarves, aided by Bilbo the Hobbit, have managed to recover their kingdom and their treasure. But they have also awakened the dragon Smaug who unleashes his wrath on the inhabitants of Lake-town. Now, Dwarves, Elves, Humans, but also Wracks and Orcs led by the Necromancer, covet the riches of the Lonely Mountain. The battle of the five armies is imminent and Bilbo is the only one who can unite his friends against the dark powers of Sauron.