 The series depicts the everyday lives of office employees in the Scranton , Pennsylvania branch of the fictional Dunder Mifflin Paper Company . In the episode , Andy Bernard ( Ed Helms ) invites his old college a cappella group , Here Comes Treble , to perform for the office during Halloween . Andy , however , gets angry when he hears that his college friend Broccoli Rob ( Colbert ) is telling a different story about the group . Meanwhile , Dwight Schrute ( Rainn Wilson ) , with the help of Nellie Bertram ( Catherine Tate ) tries to track down a person who is using prescription anxiety pills . Jim ( John Krasinski ) and Pam Halpert ( Jenna Fischer ) fight over his new job . 
