While visiting the Griffins, Brian's gay cousin Jasper announces he's engaged to his partner and wants to be married in their home. But when Mayor West bans gay marriage in Quahog to cover up an unrelated scandal, Brian becomes a crazed activist and resorts to hostile ways to change the mayor's decision. Meanwhile, Lois questions her view toward gay marriage and Chris joins the extremist "Young Republicans" group to win a girl's heart.

When the Griffins get robbed, the family runs into Peter's panic room to escape the trespassers. Now isolated and trapped, Peter insists the family know about their ancestry and narrates a chain of events in world history that explain the Griffin name. Meanwhile, after Meg is chosen to go back into the house, she scares off the robbers in an unexpected way.