In the aftermath of Nathan's fall down the stairs, Lewis and Capt. Kerry worry they'll be down yet another deckhand as they await the arrival of a new crew member. During service, the interior team continues its ongoing battle with the exterior when Mike misses a walkie call to help carry plates to the table.

With a full crew finally onboard the Mercury, things should be smooth sailing but new deckhand Seth is quick to find cracks within the leadership of his department and vows he could run it better. A Viking Oktoberfest-themed dinner serves up some brat-ty attitudes when a plate mix-up pushes Chef Jess to call out the interior in front of the guests.

Fed up with her crew's disobedience, Faye orders the team back to the picnic field to fulfill the guests' request for an afternoon of games. Lewis triumphs with a brilliant obstacle course featuring a gigantic inflatable iceberg, but breaking it down proves to be a comedy of errors for the entire deck team and creates more discord between him and Faye.

Tension between departments leaves Faye fed up as she vows that she's not going to be the nice chief stew they've had all season. Capt. Kerry mentors Lewis in the wheelhouse and suggests to his bosun he consider promoting someone to lead deckhand so he can spend more time working on his career path.

The interior department is on thin ice following the guests finding hair in their food as chips go missing at the abseiling picnic. Faye calls Jess and the stews together in an effort to heal the fractured interior, but her quest to hide the hair issue from Capt. Kerry ends in disaster.

Tension grows higher as the season gets shorter on Mercury when Faye and Jess disagree on how much food should be packed for the horseback riding adventure. Exhaustion gets to Lead Deckhand Seth, who puts the dynamic of the boat at risk when he's caught sleeping on the job.

After Kerry calls out her intimidating behavior, Jess makes a decision on whether to leave the Mercury before the end of the season. Faye faces her toughest test yet when she has to model the primary's dress at a photo shoot in Norway's famous Marble Caves while also managing service shorthanded.