On Halloween, Andy invites his old a cappella group to perform, which leads to an argument between the old friends; Dwight learns that Nellie takes anxiety pills; Pam does not approve of Jim's business decision.
Pam is reminded of a former boss during a job interview in Philadelphia; Dwight asks Angela to join him on a mission; Andy returns from his trip.
Everyone abuses the office's new espresso machine; Dwight takes Clark on a sales call; Darryl goes for an interview at Jim's company; Pam surprises Jim with a visit.
Nellie and Dwight spring into action when Pam needs help locating the vandal who defaced her mural; Darryl has a hard time dealing with Jim's habits.