-Jess and Nick convince the whole gang to join them on a cruise -- a trip with non-refundable tickets that they had planned on attending as a couple.
-However, some of the planned activities prove too romantic for Nick and Jess.
-They start feeling strange around each other, and decide to each only stay on one side of the boat, in order to avoid each other.
-Schmidt tries to win Cece back with a romantic gesture, but once he hears how important her relationship with Buster is to her, he backs down.
-Coach is very afraid of water, and the ship in general.
-The gang hatches a plan to force Nick and Jess to become comfortable around one another again by locking them in their room.
-However, everyone gets locked into the room for days by accident, and once they are saved, it becomes a regional news item.