Sneaking onto Greendale’s campus in search of proof that Chang has kidnapped Dean Pelton & replaced him with an imposter, the study group discovers that Greendale has become Chang’s personal fiefdom. Realizing that they need inside information, Troy turns to a repairman from the Air Conditioning Repair School named Murray for help. Although Murray reveals that Dean Pelton is being held in the basement of the cafeteria, he says that the AC Repair School will only help free him if Troy agrees to leave the study group & enroll in its program. So in order to protect Troy, his friends prepare to stage an elaborate heist to rescue Dean Pelton on their own.