Based on a true story about a man named Christopher Gardner. Gardner has invested heavily in a device known as a "Bone Density scanner". He feels like he has made these devices. However, they do not sell as they are marginally better than the current technology at a much higher price. As Gardner tries to figure out how to sell them, his wife leaves him, he loses his house, his bank account, and credit cards. Forced to live out in the streets with his son, Gardner is now desperate to find a steady job; he takes on a job as a stockbroker, but before he can receive pay, he needs to go through 6 months of training, and to sell his devices. 人生中，比较惨白的那一部分。总会找到一个上帝，端坐天堂。在路上。There Is No “Y” In Happiness, There Is “I”。幸福的瞬间——关于《当幸福来敲门》。从来没有幸福敲门，躲过不幸就是幸福。其实幸福不会来敲门。“励志”其实是骗人的把戏。【转帖】敌基督的“幸福” ———评电影《当幸福来敲门》by李野航。没有一颗心，会因为追求梦想而受伤害。 克里斯•加纳（威尔·史密斯 Will Smith 饰）用尽全部积蓄买下了高科技治疗仪，到处向医院推销，可是价格高昂，接受的人不多。就算他多努力都无法提供一个良好的生活环境给妻儿，妻子（桑迪·牛顿 Thandie Newton 饰）最终选择离开家。从此他带着儿子克里斯托夫（贾登·史密斯 Jaden Smith 饰）相依为命。克里斯好不容易争取回来一个股票投资公司实习的机会，就算没有报酬，成功机会只有百分之五，他仍努力奋斗，儿子是他的力量。他看尽白眼，与儿子躲在地铁站里的公共厕所里，住在教堂的收容所里…… 他坚信，幸福明天就会来临。
