Bilbo takes the Arkenstone and sneaks down to the elf/human camp.
Bilbo wants his friends to be safe, so he gives the Arkenstone to Bard.
On Bilbo's way out of the elf/human camp, Gandalf appears, and tells him: "There is an unpleasant time just in front of you; but keep your heart up!"
Well done! Mr.Baggins!
Thorin wants the Arkenstone, and so he would give Bard Bilbo's part of the treasure.
Give me a part of your treasure in exchange for the Arkenstone
I'll give you Bilbo's part. (1/4 of the treasure)
Thorin asks Dain, his cousin, if he can use his army to capture the Arkenstone without paying the agreed price for it.
Ok. We are on our way!
Dain! I need an army!!
Goblins arrive! Bard, the Elvenking, Dain, Gandalf, Bilbo, Thorin, and the dwarves join together to fight against the goblins and the wargs. Bilbo couldn't see the end because he got knocked with a rock.