距離孤山越來越近，矮人遠征軍的道路卻變得異常艱險。他們躲過了蒼白半獸人的不懈追殺，在幽暗密林前和甘道夫（伊恩·麥凱倫 Ian McKellen 飾）兵分兩路，后者前往多爾哥多探尋索倫的動向，而霍比特人比爾博·巴金斯（馬丁·弗里曼 Martin John C. Freeman 飾）和矮人們先是遭到巨大蜘蛛的襲擊，隨后又被精靈王子萊戈拉斯（奧蘭多·布魯姆 Orlando Bloom 飾）及其木精靈同伴捕獲。比爾博急中生智，利用魔戒救出伙伴，繼而引發了木精靈、半獸人和矮人遠征軍之間精彩紛呈的三方會戰。借助巴德（盧克·伊萬斯 Luke Evans 飾）的幫助，疲憊的矮人們暫時落腳長湖鎮。近在咫尺的孤山城堡，沉睡在財寶中的巨龍即將醒來…… 本片根據J.R.R·托爾金的同名原著改編。
The film describes the events leading up to, and including, the massacre of the adults of a small town in Nebraska by their children, after the adults' irresponsibility ruins the crop and the children's future.
After the death of their adoptive mother, a shy butcher and his drama queen twin sister leave the UK and adventure to Australia in search of their biological mother, but the local townsfolk of Two Heads Creek are hiding a dark secret the pair must reconcile their differences to fight for their lives in this playfully dark comedy-horror.
The film describes the events leading up to, and including, the massacre of the adults of a small town in Nebraska by their children, after the adults' irresponsibility ruins the crop and the children's future.