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.

The Parks gang completes one last task together, before saying goodbye to Pawnee.