嘉莉（珍妮弗·琼斯 Jennifer Jones 饰）出身于偏僻贫穷的山村，长大之后，她来到了繁华的大都市芝加哥，希望能够在这里过上自己梦想中的生活。然而，现实却是残酷的，拮据的经济让她不得不过着寄人篱下的日子。一次偶然中，嘉莉在火车上遇见了名为杜洛埃（埃迪·艾伯特 Eddie Albert 饰）的男子，杜洛埃多金又慷慨，嘉莉遂即同他开始了同居生活。...
A mad scientist grandfather invents a genetic transformation machine and his 4 year old grandson accidentally turns his body into that of a 30 year old man. Baby Bobby escapes and runs around town as his siblings try to catch him before their parents get back from vacation AND before the bad guys get to him first. The machine is worth a lot of money and they only have a day before the machine loses its capabilities to change baby bobby back....
