The boys overhear the teacher requesting a week-long closure of the school so she can attend her sister's wedding. The superintendent of schools says that nothing short of an epidemic would accomplish that. The boys decide to create an epidemic, and inflate rubber balls under their shirts to give themselves fat stomachs, and paint spots around their eyes. Meanwhile, Waldo finds out that, in light of the students' exemplary grades, the superintendent will make an exception and close the school. He sends Porky to deliver a note to the boys, but Spanky doesn't have the patience to wait for Porky to remember which pocket it's in. The boys go to a doctor to be diagnosed, not realizing he's a veterinary doctor. He examines Buckwheat first, behind a closed door, leaving Spanky and Alfalfa to overhear details about monkey serums and the like. When the doctor leaves, they go in for Buckwheat, only to find a monkey sitting there.