Dunder Mifflin’s staff becomes obsessed with their weight when a weight loss initiative causes the branch to diet.
Jim misses Pam who is attending art school. Dwight, Andy and Angela handle some unfinished business.
Holly holds a business ethics seminar. Michael lets everyone speak freely about their unethical behavior at work, landing Meredith in the hot seat when she reveals an affair with a supplier. Meanwhile, Jim challenges Dwight's contention that he never steals company time with personal business, by timing every personal nuance with a stopwatch.
Michael and Dwight practice for the birth of Jan's baby, while Michael tells Holly that he will pretend to dislike her for Jan's benefit.
Michael decides to help Pam get a part time gig at corporate so she can pay for art school. Later, Michael and Holly get an early start at the office on their date night. But when the office gets robbed, Michael decides to have an auction to raise money to pay for the things that were stolen.
Pam is the only person wearing a costume to her office on Halloween. Holly and Michael take a long trip to Nashua after corporate transfers her because of their relationship. She ends up breaking it off with Michael. Finally, Dwight torments Andy in an effort to get under his skin by applying to his alma mater.
Dwight and Jim get the results of the annual customer survey report and they are not good. Pam and Jim decide to spend every minute together via their Bluetooth earpieces. Meanwhile, Angela and Andy pick Dwight's farm as the location for their wedding.
When David Wallace decides to send Michael on a business trip to Canada, Michael is ecstatic. Andy and Oscar become friends all of a sudden, when Michael decides to bring them along on his trip. Meanwhile, Jim counts down the days until Pam gets back.
A mysterious person in the office has made a huge mess in the microwave and will not clean it up. Meanwhile, Michael has to come to terms with the fact that there have been certain personnel changes in his staff without his knowing.