Dr. Elena Kinder and Dr. Heap work for BABYCO, the world's leading manufacturer in baby products. What the public doesn't know, however, is that Dr. Kinder and Dr. Heap are secretly working on cracking the code to "baby talk" which is actually a highly sophisticated language which allows babies to communicate the knowledge of the secrets of the universe with which they are born. Problems arise when Sly, the smartest of the babies, escapes from the lab and unites the babies of the outside world to help free the babies trapped in the lab. Kinder and Heap must find Sly before it is too late. Written by Anonymous

Following on from the plot of the last movie, babies can communicate with each other using 'baby talk', and have an innate knowledge of the secrets of the universe. The baby geniuses become involved in a scheme by media mogul Bill Biscane (Jon Voight). Helping the geniuses is a legendary superbaby named Kahuna. He joins up with several other babies in an attempt to stop Biscane, who intends to use a state-of-the-art satellite system to control the world's population.