A local Pawnee group, the Reasonabilists (aka "Zorpies"), members of a doomsday cult who follow "Zorp the Surveyor", predict that the end of the world is coming.
Since they have been wrong in predicting the world's end in the past, they are not taken seriously, and Leslie Knope lets them hold an all-night vigil in the park, a Pawnee tradition.
Chris Traeger asks Leslie and Ben Wyatt to join him in monitoring the Reasonabilists during their vigil, which makes the two feel uncomfortable due to their recent break-up.
As a precaution to the world's supposed demise, April Ludgate decides to help Andy Dwyer check off everything on his bucket list before the end of the day.
The two decide to spend their last amount of money to hold an “end of the world” party in their office space since the lease is not up until the following day.
In its original American broadcast, "End of the World" was seen by nearly 4 million household viewers, according to Nielsen Media Research, with an overall 2.0 rating among adults between ages 18 and 49.