Janine is thrilled to help introduce a new beverage to the cafeteria, but it ends up causing unexpected consequences for the students, teachers and school plumbing system. Elsewhere, Melissa clashes with her new aide, Ashley, who brings more disruption than help to the classroom.

Barbara’s candle accidentally starts a small fire in the teacher’s lounge and a counselor suggests that she might not be handling the aftermath well. Meanwhile, Melissa rekindles her childhood dream of being a firefighter.

Janine's plan for a Memorial Day weekend solo trip is derailed when her mother shows up unannounced asking for help; Gregory notices his colleagues are great at small talk and realizes he needs to brush up on his people skills.

Gregory forms a bond with one of his students, but the student’s dad becomes jealous of their relationship and seeks a confrontation. Melissa suffers a fall but avoids receiving medical attention for the injury.

Ava and the teachers must band together to hide the golf-course contraband.