曾在直播节目中大出其丑的主播埃文·巴克斯特(史蒂夫·卡瑞尔 Steve Carell 饰)走下演播台,开始转战政界,并成功当选布法罗的议员。他努力打造自己的良好形象,以“改变世界”的口号赢得选民的支持,同时这也是夜晚睡前祈祷的内容。在此之后,埃文带着一家四口人来到弗吉尼亚州的亨茨维尔小镇居住,即将展开全新的政坛生活。 埃文的仕途顺风顺水,刚刚走马上任就得到呼风唤雨的朗议员(约翰·古德曼 John Goodman 饰)的器重,成为最新议案的共同发起人。正在这关键时刻,上帝(摩根·弗里曼 Morgan Freeman 饰)却突然出现在埃文面前,他只被要求干一件事,那就是建造一艘方舟。埃文的生活自此起了翻天覆地的变化……Buffalo newsman Evan Baxter is elected to Congress with the slogan, "Change the world." He lucks into a huge house in a new Virginia suburb. His Capitol office is also fantastic, but there's a catch: he's tapped by the powerful Congressman Long to co-sponsor a bill to allow development in national parks. In steps God, who appears to a disbelieving Evan and gently commands him to build an ark. Tools and wood arrive in Evan's yard, animal pairs follow, his beard and hair grow wildly, nomad's clothes and a staff appear. Long grows impatient, Evan starts building, his family leaves him, reporters gather, and drought grips D.C. Still, Evan believes. But will he change the world?