The Hobbit
The dwarves and Bilbo travel to the Lonely Mountain. They can find the secret door into the mountain, and open it. Bilbo goes in two times and meets the dragon Smaug. Bilbo steals a golden cup, and finds out that Smaug has a weak place on his left chest. Bilbo tells this to the dwarves, but a thrush (a bird) also hears it. Smaug is angry and goes out to destroy Lake-town. But in Laketown the thrush tells the archer Bard of the dragon's weak point, and Bard shoots the dragon. A big part of Laketown is destroyed, but Smaug is killed.