Tom tries to get back at Ron by going out on a date with Ron's ex-wife Tammy, while Leslie tries to protect Ron from falling prey to her charms. Meanwhile, April is assigned to work with Chris.

Leslie's ex-best friend, Lindsay Carlisle Shay, launches an attack on Pawnee, banning residents from visiting a nearby park in the neighboring city of Eagleton with a large fence, causing Leslie to go to war with Eagleton. Meanwhile, everyone finds out that it is Ron's birthday, a fact that he went to extreme lengths to conceal.

While trying to get an endorsement from the Chief of Police, Leslie and Ben awkwardly run into Leslie's old flame, Dave. Meanwhile, Andy and the rest of the office work on a theme song for Leslie's campaign.