It's been six months since "The Office" documentary aired, and the documentary team has returned to Scranton for a Q&A panel with the cast. It's the day before Dwight and Angela's wedding, and old friends are returning for both the wedding and the panel discussion. It's an exciting weekend for the Dunder Mifflin family.
A lot has changed over the past six months. Dwight has fired Kevin and Toby; Oscar is running for State Senate; Meredith has cleaned up her act; Stanley retired to Florida; Nellie moved to Poland; Andy gained Internet fame thanks to his epic breakdown on "America's Next A Cappella Sensation"; Creed faked his own death and is now a wanted felon; and Dwight has instituted Japanese business practices at the office.
As Dwight's best man, Jim is responsible for coordinating the bachelor party. He's spent the past 12 years pranking Dwight, but now Jim has a collection of amazing surprises in store. Darryl has flown in from Austin, where he's having great success at Athlead and is eager to show off to his old friends. Toby arrives from New York, where he's finally pursuing his dream of being a novelist.
Jim explains that, as one of his surprises for Dwight, he arranged for the documentary reunion taping to occur on the same weekend as Dwight's wedding so that everyone could attend. Without further ado, the guys head down to a limo and head out for their bachelor party night. Their first stop is a field, where Jim has arranged for Dwight to shoot a real bazooka. It's the best gift Dwight could ask for.
Next, the bachelor party heads to a restaurant where Dwight is treated to a stripper. Dwight thinks that the stripper is the waitress and becomes frustrated by her lack of service. Meanwhile, Angela and the ladies have a bachelorette party at Schrute Farms, where they are entertained by a male stripper who turns out to be Meredith's son. Meredith awkwardly tries to coach her son through his routine.
Later at the bachelorette party, Mose arrives and kidnaps Angela. Pam calls Jim to break the news, and Dwight immediately recognizes the prank as a Schrute family wedding tradition. He informs the bachelor party that they'll have to find Mose at a local bar in order to rescue Angela.
The bachelor party arrives at the pub where Kevin is tending bar. Of course, this was all part of Jim's plan, and he encourages Dwight and Kevin to make amends. Mose lets Angela out of the trunk of his car. The next day, the group arrives for the Q&A panel. An enormous crowd arrives, and the fans are rabid about the documentary and the personalities they've come to know and love. Creed is also in the audience wearing a disguise.
That afternoon, everyone heads to Schrute Farms for Dwight and Angela's wedding. Kelly arrives and quickly encounters Ryan, who is now donning a decorative baby to help him pick up women. Within moments, Kelly and Ryan make out, run away together, and leave the baby in Nellie's care.
Inside the house, Jim has another surprise for Dwight: he's secretly invited Michael Scott to takeover as Dwight's best man. The wedding ceremony is beautiful and serene, and afterward, the wedding guests tear it up on the dance floor. Michael is overjoyed to be with his old co-workers, and everyone is elated. After the reception, the gang heads back to the warehouse for an after-party.
After a weekend of planning surprises for Dwight, Jim is treated to a surprise of his own: when he and Pam arrive home after the wedding, Pam tells Jim that she sold the house so that they can move to Austin and start a new life at Athlead. After everything Jim has sacrificed for her, it's the least she can do for him. Jim is overjoyed.
In the warehouse, Pam reveals her new mural, which depicts what Dunder Mifflin is really all about: the employees we've all come to know and love over the years. After a few photo moments, the gang sneaks away from the crowd to the office upstairs for a more intimate reunion party where they exchange stories about the good old days.
Jim and Pam tell Dwight about their Austin plans, and Dwight immediately fires them so that they can collect severance pay. The room is filled with laughter, cheer and love. Jim thanks the film crew for the amazing gift of being able to watch his life on film, and Pam comments that they chose the right office for their documentary. Eventually, everyone departs to go their separate ways. They may be departing on their own adventures, but they will always be a family. Also, Creed gets arrested.