Kelly invites the entire staff to a celebration of Diwali, the Hindu Festival of Lights. Michael mistakenly believes it to be an Indian version of Halloween.
In Stamford, Jim decides to bicycle to work. Andy turns a late night of paperwork into an excuse to drink. Karen, unbeknownst to Jim and Andy, pours her shots into her wastebasket.
Ryan fails to make a favorable impression on Kelly's parents, who in turn try to set up Kelly with a young doctor. Initially reluctant to attend the festival, Pam gives in and ends up enjoying herself.
Inspired by a conversation with Kelly's parents about Hindu marriage customs, Michael publicly proposes to Carol. Uncomfortable, Carol declines his offer and leaves the room. She later explains that this is only their ninth date, and drives home, leaving Michael to find a ride. Pam sends a text message to Jim, who does not answer because he is passed out on his desk. At the end of the evening, Michael mistakenly thinks that he and Pam have a connection, and is rejected when he tries to kiss her. She gives him a ride home on the condition that he sit in the back seat.
Jim tries to ride his bike home but is too drunk. An amused Karen gives Jim a ride.