It's Cece's baptism and Michael has invited everybody in the office to come. Michael continues to do his Godfather impersonation until Pam makes Michael say out loud that he's not Cece's godfather. Michael is disappointed that Pam and Jim are boxing him out.
Jim changes CeCe's diaper before the baptism, and in the process, Cece messes up her christening dress. The only backup Jim has brought is an old jersey. After Cece's baptized, it's announced that Jim and Pam are hosting a gathering next door, which is surprising news to Jim and Pam.
Jim and Pam realize they're hosting a gathering for everyone who was inside the church, including a youth group and families of other babies that were being baptized. Meanwhile, their co-workers are not pleased with the food selections being offered.
When Michael brings up wanting to do more charitable acts as a group with his co-workers, he's met with jokes and laughter. Michael is so disappointed by their reaction that he calls them all "mean girls." After his rant, he storms out of the church and gets on a bus with the youth group headed to Mexico.
When Andy sees how moved Erin is by Michael's sudden decision, he gets on the bus too. Once Andy gets on the bus, he tells the youth group he'll probably he borrowing a few items like a contact case, sandals and sunscreen. Michael and Andy both begin having second thoughts as soon as the bus leaves.
When Meemaw loses Cece, Jim panics, fearing that Angela has taken her. He calls everyone to attention and tells Kevin to stop Angela from leaving. Just as Kevin causes a scene, Helene walks in with a freshly changed Cece. Both Pam and Jim are elated to see their daughter.
Michael and Andy both decide to head back to Scranton and do all they can to stop the bus. They tell the youth group they're not ready to move to Mexico and start chanting, "Stop the bus!" After the bus drops them off, Erin picks the guys up and they all head back home.