In the episode, Mrs. Garrison tries reuniting with her ex-boyfriend Mr. Slave, but finds out that he is going to marry Big Gay Al after the governor of Colorado legalizes same-sex marriage in the state.
Garrison attempts to take Mr. Slave back, only to learn that he and Big Gay Al are going to get married as soon as the governor of Colorado legalizes same-sex marriage.
Garrison rallies a crowd of people to petition against same-sex marriage and, upon realizing the governor won't veto the bill without proof that gays don't have the skills necessary to raise a family, makes plans for the final egg check to be in front of the governor's office and alters the pairs so that Stan and Kyle are the 'same-sex couple'.
The two boys reconcile and rush to the governor's office in a taxi, with Kyle calling Mrs. Garrison and telling her their egg is fine and that they are on their way.
The governor inspects the egg and, upon seeing that it is undamaged, announces that same-sex marriage is now legal in Colorado, greatly horrifying Mrs. Garrison and confusing the boys about the entirety of what happened.