In order to prepare for the new baby, Fred and Barney rehearse taking Wilma to the hospital. Then the real thing happens and Wilma gives birth to a baby girl and names her Pebbles.

Fred has a tough time with the nurse that his mother-in-law sends (and as Fred says, resembles Mother in Law) to help Wilma with caring for the newborn baby, Pebbles. Fred fires her and takes over, but fails miserably. In the end, the nurse does return.

Fred gets mad with Barney's ventriloquist joke he pulled on him that Pebbles could speak. Later, Barney comes over and calls a truce with him and he get himself and Fred tickets to a big wrestling match, so Fred calls a babysitter to watch Pebbles, but she comes over and parties instead of baby-sitting Pebbles. So Barney suggests that he and Fred sneak off with Pebbles to the big wrestling match that Wilma and Betty are watching on television.