Jeff returns to Greendale when his former law partner Alan Connor recruits him to gather evidence for a lawsuit he is pursuing. Dean Pelton is thrilled to see Jeff back at Greendale. Thinking he is there to help save the school, he quickly calls the study group back together - surprising Jeff with a reunion.
Jeff settles into a new job at Greendale and adjusts to the expectations of being on staff - Professor Hickey shows him the ropes and shares some pointers on how to manage unruly and demanding students. Meanwhile, Abed convinces the study group to take a new class, "Nicolas Cage: Good or Bad", with Professor Garrity.
Everyone is up in arms when an anonymous bandit starts dropping coins down people's pants. While Dean Pelton mobilizes the school to investigate, Jeff and Annie pursue their own theories - methodically interrogating staff members. When someone eventually confesses, the school heaves a sigh of relief, but Jeff thinks there is more to the story than meets the eye.
After Pierce Hawthorne's unexpected passing, a team of investigators headed by the no-nonsense Mr. Stone, arrives at Greendale to submit the study group to lie detector tests before they can be considered for distributions under the will. Tensions mount as Mr. Stone digs in with the questions and the group members learn a little more about one another than they wished.
Abed plans an epic going-away party as Troy prepares to leave Greendale; a fun game transorms into a high-stakes competition.
It's time for the midterm dance and Annie sets about getting the Greendale cafeteria ready for the festivities. She and Professor Hickey team to navigate Greendale's custodial corridors of power and must negotiate with Bob Waite, the politically savvy Greendale head custodian, and his right-hand man Lapari. They must also contend with Debra Chambers, Greendale's head of I.T. and Waldron, Greendale's head of parking, in what becomes an increasingly complex hierarchy of staff.
Professor Duncan decides it's time to seduce Britta and Jeff counsels him on how to close the deal. Meanwhile, Britta runs into some old friends and realizes that they have moved on from their shared anarchist views of the past. Abed runs afoul of Professor Hickey when he accidentally damages some drawings Hickey has been laboring over. When Hickey restrains Abed as punishment, the two wind up spending some meaningful time together. Meanwhile, Chang finds himself performing an impromptu one-man show for a ghostly audience.
Dean Pelton invites two designers to Greendale to beta test their new social networking Application. What starts as a fun social interaction of ranking classmates turns into an all-out class war as Greendale students compete for the highest score. Jeff and Shirley battle for supremacy, while Britta rails against the very concept. Meanwhile, Professor Hickey goes underground - literally - until the whole thing blows over.
When Jeff, Shirley and Professor Hickey happen upon a hidden cache of textbooks, the discovery leads to some interesting power shifts as the group struggles with how to monetize their windfall. Meanwhile, Abed and Annie decide it's time for a new roommate. Abed wants his friend Rachel to move in, while Annie wants her brother to move in. When they decide to play an old VCR game to determine the winner, things get a little intense.
Professor Hickey reveals that his estranged son Hank did not invite him to his grandson's birthday. The group decides to help father and son reunite through a rousing game of "Dungeons and Dragons".
The study group gets 'animated' in the vein of the 1980s 'G.I. Joe' series.
As Subway makes plans to purchase the Greendale campus for their own Subway University, the study group members contemplate the end of an era. Jeff considers a generous offer of employment he has received from Subway, while Britta considers an offer she has received from Jeff. Meanwhile, Dean Pelton tells Annie and Abed about Greendale's first Dean Russell Borchert, which leads to an interesting and potentially lucrative discovery in the walls of Greendale.
The group learns the history of Greendale's first Dean, Russell Borchert, a reclusive, wealthy genius who disappeared amid a personal scandal in the 1970s. Once Shirley and Hickey locate the school's blueprints, Annie and Abed lead the search for Borchert's old computer lab, which was sealed off years ago. Subway returns to Greendale with plans to take over the campus for a Subway University and they enlist Chang to secretly keep tabs on the study group. Meanwhile, Jeff and Britta make a grown-up decision about their futures.