After Ron breaks up with Tom's ex-wife, he decides to get back together with his Tammy, much to everyone's horror. Meanwhile, Leslie and Ben try to get the local police to donate their services to the upcoming Harvest Festival.
While Leslie tries to get an endorsement from the police chief, Dave returns to tell Leslie that he's still in love with her. Meanwhile, Andy tries to put together a campaign theme song.
Leslie unsuccessfully tries to win over a focus group member who made a negative comment by going bowling with him, and Chris gets some bad relationship news while calling for campaign donations.
The department has to put together an last-minute fund-raising gala for the new park without Leslie, who has been called away on an emergency disaster drill. Meanwhile, Andy takes his police officer exam.
Leslie battles with Tom on her first day back with the Parks Department, the gang pranks Ben on his first day as City Manager, and Chris and Ann shop for a ring after their engagement.