When her high school reunion is held at William Penn, Lainey tries to hide her teaching job from old classmates, pulling a “Romy and Michele” lie with the help of Erica Goldberg and CB. Meanwhile, Mellor’s distraught to learn his star athlete alum, Ruben Amaro Jr., sees Glascott as more of a mentor than Mellor.

Lainey is asked to direct another school musical, but she is unsure whether she can top herself after the success of last year's production; Coach Mellor's athletic records may soon be broken, so he must find a way to keep his name in the spotlight.