In order to "save" Stewie from autism, Peter and Lois decide not to vaccinate him and then proceed to convince the rest of Quahog to follow suit. Stewie runs away to save himself from diseases until Sean Penn (guest-voicing as himself) swoops in to save the day and brings vaccines to the whole town.

Carter buys the Pawtucket Patriot brewery and decides to cut some corners to save a few bucks. Peter overhears the plan and runs and tells investigative journalist Tricia Takanawa about Carter's plan to use toxic chemicals in the beer cans. Meanwhile, Brian's drivers' license has expired and he enlists Stewie as an instructor.