Preparing the Summer Events Catalog, Leslie decides to take Ron and the past directors of the Parks Department out for a picnic lunch. Tom enlists the help of Ann and Mark to pose for the cover photo.

Leslie tries an online dating service, but doesn't end up with a stranger as she expects. Also, Chris challenges Ron to a grilling competition as part of his plans to make Pawnee healthier.

Leslie helps a local swim team get more practice time by working on a new law that extends the hours at the community pool; Ron finds himself filling a pothole for a local woman (Lucy Lawless) as part of Chris' new plan to solve citizens' problems around the city; April and Ben take a road trip to Pawnee.

Ann tries to get to know herself as Leslie meddles in one of her biggest life decisions. Meanwhile, things go south when Ben enlists the guys to help choose a caterer for the wedding.

Leslie's efforts to take down the wall separating Eagleton and Pawnee yield unexpected results; Ben and Tom meet with possible sponsors for the concert; Ron finds a new hobby.

Leslie helps organize the high school's Senior Prom, and battles with Ron over the future employment of a bright high school senior. Andy takes an unwilling April as his date, and Tom is tasked with DJ'ing and agrees to let Ben help.

Leslie holds a rally in an attempt to keep JJ's Diner from closing. Tom surprises Donna with the ultimate pre-wedding gift.

Donna and Joe tie the knot, while April attempts to keep the wedding running smoothly. Ron creates an awkward situation between Tom and Lucy. Jen Barkley arrives at Ben and Leslie’s house with an interesting opportunity.