It has been a year since Johnny and Wayne created the Ultimate Bra for Samantha's company. Now, Johnny and Lena (Wayne's girlfriend) are asked to make the Ultimate Baby product, called Mighty Baby. When Johnny and Lena are stumped, they turn to Wayne...but Wayne is terrified of babies. To help things out, Lena hires Boey, an expert on babies, to join the team. However, Boey and Wayne get closer and Johnny (who had broken up with Samantha) falls for his new secretary, the paranoid Sabrina. However, they must get the Mighty Baby product done before they can settle their personal affairs.