A staff meeting is scheduled to enlighten staff members about Hindu culture. This is met with disgusted replies by Angela, excitement by Kevin (particularly after seeing illustrations in a kama sutra booklet distributed by Michael) and an uncomfortable Toby, who decides to end the meeting and takes away the booklets.
Back in Stamford, Jim has decided to follow Josh's example and ride his bike to work. Meanwhile, Andy pulls out a bottle of Jagermeister and shot glasses to turn a late night of work into a drinking game, which Karen wins by pouring her shots into her wastebasket while the two men continue to down shots.
Michael and Carol arrive at the Diwali festival in costume, since Michael thought the celebration would be a "costume party." Carol is a cheerleader and Michael is wearing his papier-mâché twin from Halloween 2005, which he quickly removes.
Ryan, dressed in a kurta (traditional men's Indian attire), tries to acquaint himself with Kelly's family, which is met with giggling by Kelly's younger sisters, whom Ryan believes compared his looks to Zach Braff in their language (they say "Kelly likes Zach Braff... " in Hindi). and disapproval by Kelly's parents, who want to set her up with an Indian doctor. This only gets worse when Ryan speaks with her parents about his promotion at Dunder Mifflin and his plans to save money for travel and an Xbox. Dwight gets into the spirit of the festival and dons a red Kurta. Even Michael is shown dancing happily to the music.
Initially reluctant to attend the festival, Pam decides to go and actually enjoys herself as she starts dancing along with the staff and the rest of the festivalgoers. A cleaned up Roy shows up in time to find Pam in the middle of the dancing crowd, making him uncomfortable, and he silently exits the party.
Michael has an enlightening conversation with Kelly's parents about Hindu marriage customs and suddenly interrupts the celebration to publicly propose to Carol. Uncomfortable, Carol declines his offer and leaves the room. Michael follows her out to the car, where they briefly talk; Carol citing that this is only their ninth date, while Michael states how much he likes her. Carol drives home, leaving Michael to find a ride.
Meanwhile, Pam is surprised to find herself inspired by Michael's outgoing, romantic nature and she sends a text message to Jim. However, Jim is passed out on his desk and is unaware of the incoming message on his cell phone. As the Diwali festival winds down, a dejected Michael makes an attempt to kiss a disappointed Pam, who stops him, and reluctantly agrees to drive him home, as long as he sits in the back seat. On the drive, he mentions the shoes he's wearing aren't his own.
Back in Stamford, Karen leaves for the night, as Jim continues to lie face down on his desk and Andy is laid out on the floor, both completely inebriated. Jim asks Andy if he can get a ride but Andy says "No way, dude," and begins to unfurl an inflatable mattress. He offers to share the "roomy twin" with Jim. Jim decides to ride his bike home but barely exits the front door when he crashes sideways into the bushes. An amused Karen laughs and offers Jim a ride home. He accepts immediately and crawls into her backseat leaving her to deal with his bicycle.
- In a talking head interview, Pam explains that she understands that she should get out more, but is not convinced that a Diwali party is the right venue.
- Angela doesn't understand why the office is going to a party for a holiday that doesn't even exist.
- In a talking head interview, Angela explains that some people in the office are too obsessed with things Indian. The documentary filmmaker underscores this point with the moment from Christmas Party where Kelly kisses Dwight.
- In a talking head interview, Michael explains that as the boss, he must support all cultures, and that certain people have been offended, and Diwali provides an opportunity to make it up to them. The documentary filmmaker underscores this point with the moment from Diversity Day where Kelly slaps Michael.
- Michael tires of Kelly's description of Diwali and demands an explanation in three words or less. "An Indian Halloween." Jan is upset that Michael is letting everyone off work early to go to a party, and Michael acts shocked that Jan doesn't know what Diwali is.
- In a talking head interview, Michael answers the question "Are you excited about the Diwali party?" by telling a rambling story about his original plans with Carol for a romantic evening.
- Dwight asks Ryan how much his kurta cost.
- Michael asks Pam to notify the office about his Diwali meeting and gets upset when Pam suggests that she isn't going to the party.
- At Michael's conference, he identifies Sir Ben Kingsley as responsible for the departure of the British from India. "And then he became an actor, like Ronald Reagan." Pam points out to Michael that his shirt is buttoned wrong. In a talking head interview Pam is frustrated that she can't share the moment with Jim.
- Dwight asks Pam if she's afraid Roy will attend the Diwali party with a new girlfriend, or maybe Roy will find a hot Indian girl, or maybe Dwight will. Angela overhears this remark.
- Andy tells the documentary camera that his fraternity name was "Hubble" for his ability to spot a party. It was better than his freshman nickname, when he had a skin problem, when his nickname was "El Guapo".
- Phyllis's curiosity about the food at the Diwali party annoys Stanley.
- In a talking head interview, Angela explains that as the head of the Party Planning Committee, she is obligated to attend all office parties, even one held in Hell.
- When the Stamford staff order sushi for dinner, Andy offers "Big Tuna" Jim the tuna, but Jim asks for the eel. Andy is puzzled.
- Kelly is overjoyed when Pam arrives and takes her to meet some cute guys.
- Carol introduces herself to Ryan, who is uncomfortable that she has learned so much about him from Michael.
- Pam talks with the young Indian doctor, who invites her to dance. Meanwhile, Dwight engages in a light saber battle with a young boy.
- Kevin mocks Michael after the failed proposal.
- In a talking head interview, Ryan says that he was at the Diwali party just for the free food. He takes off his kurta and can't find his shoes.
- Dwight stops Angela as she leaves the Diwali party. Angela is quietly upset at Dwight, who reassures his "monkey" that his interest in India is restricted to its culture. He then loudly announces that it is late and asks Angela if he can stop by Angela's house for some Pepto-Bismol. Angela smiles to herself, then spots Kelly and Ryan and scolds them for making out in public.
- Kevin appeals to Kelly's parents to hire his band for Diwali 2007.
- Michael loses at cards to an old Indian woman.
- Steve Carell as Michael Scott
- John Krasinski as Jim Halpert
- Jenna Fischer as Pam Beesly
- Rainn Wilson as Dwight Schrute
- B.J. Novak as Ryan Howard
- Leslie David Baker as Stanley Hudson
- Brian Baumgartner as Kevin Malone
- David Denman as Roy Anderson
- Kate Flannery as Meredith Palmer
- Mindy Kaling as Kelly Kapoor
- Angela Kinsey as Angela Martin
- Paul Lieberstein as Toby Flenderson
- Phyllis Smith as Phyllis Lapin
- Creed Bratton (actor) as Creed Bratton
- Mike Bruner as Tony Gardner
- Charles Esten as Josh Porter
- Ed Helms as Andy Bernard
- Rashida Jones as Karen Filippelli
- Nancy Walls as Carol Stills
- Tanveer Atwal as Rupa (Kelly's Sister)
- Gagandeep Bedi as ???
- Sunah Bilsted as Waitress
- Vali Chandrasekaran as ???
- Avu Chokalingam as Kelly's Dad
- Swati Chokalingam as Kelly's Mom
- Varun Gurunath as Dancer
- Siddharth Jain as Dancer
- Anita Kapila as Dancer
- Ananya Kepper as Tiffany (Kelly's Sister)
- Nakul Dev Mahajan as Dancer/Choreographer
- Jaysha Patel as Neepa (Kelly's Sister)
- Sangita Sanyal as Dancer
- Karishma Sawhney as Dancer
- Rita Sehmi as Dancer
- Kunal Sharma as Food Server/Teenager #1
- Rohan Vora as Dancer