一位疯狂的科学家祖父发明了一种基因改造机器，他的4岁孙子不小心将其身体变成了30岁男人的身体。 婴儿Bobby逃脱并在镇上奔跑，因为他的兄弟姐妹在父母休假回来之前和坏人先到达他之前试图抓住他。 这台机器值得很多钱，他们只有一天的时间才能失去它的更换婴儿摇篮的能力。

  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.