When Stan gets kidnapped in Colombia, Francine fears he's gone for good. Stan finally reappears unharmed, but the real trouble erupts in the Smith household when he admits that he has a plan to marry his dentist if Francine dies before him. Meanwhile, Steve and Roger play detective duo "Wheels and the Legman."
Meg becomes extremely religious, and tries to convert Brian from Atheism. Meanwhile, after the family visits a Star Trek convention, Stewie kidnaps the entire cast of Star Trek: The Next Generation and forces them to hang out with him.
After Marge and Homer's marriage turns out to be invalid, they decide to re-do their vows. But when Homer goes missing, Bart and Lisa smell something funny and investigate his disappearance.