Balki and Mary Anne return from their 5 month honeymoon in Mypos to a very pregnant, very uncomfortable Jennifer. Balki has brought home a special root from Mypos that he says will cure her pregnancy pains but she refuses to try it. Desperate to ease Jennifer's pain, Larry decides to try the root to prove its innocence. But the root acts like a drug and the cousins get out of control.
Balki becomes infected with the Myposian death curse, which means he can never touch another living thing without killing it. His mama sends him a special suit which he must wear until the curse is broken.
Mary Anne goes into labor early, leaving Jennifer overdue and miserably still pregnant. Desperate to find a way to force herself into labor, Jennifer drags Larry and Balki to the county fair in an attempt to force her baby to come.