The neighboring construction site of a new golf course causes issues at Abbott, forcing the teachers to find creative solutions; an HR representative visits the school; following their kiss, Janine and Gregory's relationship status is revealed.
When it's revealed that a student in Jacob's class has ringworm, the faculty must band together to stop it from spreading through the entire school.
It's Halloween at Abbott Elementary and Janine and Gregory proudly show off their couple's costume, but it fails to translate; Barbara faces pushback from parents concerned about hygiene and her beloved apple-bobbing tradition.
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.
When the neighborhood deli is forced to close to make room for a trendy smoothie place, Melissa, Barbara and Jacob team up to fight the gentrification; the district asks Ava to give a presentation to fellow principals.
Despite a few setbacks, Barbara is determined to make Abbott Elementary's first-ever holiday show a success; Jacob's brother arrives for his visit earlier than planned.
Melissa hosts the Schemmenti family Christmas Eve dinner and goes to great lengths to make sure everything is perfect; Janine and Gregory get an unexpected guest.
Ava announces the school district is sending a group of volunteers to help out at Abbott; however, when they arrive, things don't go as planned.