简介：多年前科学家进行了一项创造完美人类的饰演，没想到实验过程中的细胞分裂不均匀导致了这个实验只成功了一半，另一半则完全失败。科学家创造出来的这对双胞胎兄弟一个是完美人类的典型――德智体美全面发展的高大的朱利斯（阿诺?施瓦辛格 Arnold Schwarzenegger 饰）；另一个则是人类所有缺点的集合体――小矮个文森（丹尼?德维托 Danny DeVito 饰）。兄弟两一出世就被分离，朱利斯被科学家送到南海的一个小岛上抚养长大，而弟弟则在孤儿院度过了他的童年。 直到兄弟两已过不惑之年，他们才知道了对方的存在。朱利斯与未曾谋面的兄弟文森重逢后，两兄弟决定踏上寻找亲生母亲之路。但是这时，一场意外给他们惹来了杀身之祸。
简介：Ryan is a womanizing stockbroker whose unethical business practices cost him his job and his trader's license. Unable to find another job, he is forced to move in with his equally self-involved (and completely oblivious) girlfriend, Cindy, an insensitive advice columnist on the cusp of losing her own job due to her poor advice and slow work habits. Finding that the truth behind his moving in has nothing to do with romance, Cindy runs off with another man. Ryan decides to stay in the apartment and earn a living by doing Cindy's job. Ryan establishes himself with Cindy's editor, Page, as Cindy's go-fer, collecting Cindy's paychecks and mail and delivering her columns. Initially as hopelessly inept as Cindy in giving advice, he nearly gets the column canceled. However, he rapidly grows into the job and the combination of forced introspection, research and the growing knowledge that he is touching other people's lives transforms him. The column becomes an amazing success. Ryan finds his initially superficial attraction to Page growing into love, but he cannot reveal his feelings while he is a deceptive fraud. Meanwhile, Cindy becomes aware of her growing fame, and returns to cash in, at the same time that the owner of a rival newspaper chain attempts to force Page to sell Cindy's column to him.