前特工麦考尔英雄归来，伪装成司机霸气出场，凭借非凡技能徒手放倒多位罪犯。然而，他突然听闻老友苏珊生死未卜，事发前两人的关系也成为本片的重要线索，特工麦考尔不惜孤身犯险，不料却陷入一场未知的惊天阴谋。

Bilbo Baggins the Hobbit was just minding his own business, when his occasional visitor Gandalf the Wizard drops in one night. One by one, a whole group of dwarves drop in, and before he knows it, Bilbo has joined their quest to reclaim their kingdom, taken from them by an evil dragon named Smaug. The only problem is that Gandalf has told the dwarves that Bilbo is an expert burglar, but he isn't....