It's the annual CIT Parents' Weekend. Mack must deal with Zoe's high maintenance mother and Buzz, who doesn't like her punishment for his drinking on his birthday. Roger inadvertently reveals Sarah's secret affair with Miguel. Kip has a health scare, revealing to the group that he has cancer.

When a local official begins issuing marriage licenses to same-sex couples, Mack hosts a wedding for Raffi and Todd at the camp after Grace convinces them to get married there. Roger throws a bachelor party, hoping to attract more gay people to his Ridgefield camp. Kip overcomes his health scare and dumps Chloe, in order to show his true affection to Marina. The governor voids the issued licenses but Raffi and Todd have the ceremony anyway. At the wedding party, Cole makes a move on Mack.