The first charter gets rocky when the guests get in a drunken personal fight; the next morning, the guests' excitement to sail puts Daisy and Natasha at odds over serving breakfast on heel; Jean-Luc realizes he may have lost two guests at sea.

Deckhand Jean-Luc tries to rebound after losing two guests, but his inability to sleep in his undersized bunk interferes with his work and his attitude. When the dust settles, the crew gives the guests a lot to mullet over as they pull together a rip-roarin’ 80s rock party. A confrontation about pita bread between Chef Natasha and Chief Stew Daisy doesn’t add up. Captain Glenn pushes the boat hard during a lively sail as primary charter guest Nikki’s father blesses the group with favorable winds. The crew goes absolutely wild during their first night off, and First Mate Gary makes a drunken decision that could have dire consequences for the deck team.

The hungover crew of the Parsifal tries to piece together what they did the night before; Dani does some sleuthing while Gary and Sydney downplay their hookup; Daisy's frustration with the deck team ratchets up.

The Parsifal crew is on edge waiting for important test results; when night falls, they play a naughty game of Truth or Dare; when Sydney notices that flirtations between Alli and Gary are heating up, she takes matters into her own hands.

Natasha finds it nearly impossible to keep the galley afloat; Gary can't get any one-on-one time with Alli with Sydney hovering nearby; a beach picnic turns into a fiasco; the deck team puts on a drag show that has the guests raving.

Feeling a lack of support, Daisy remains at odds with Gary and Natasha; Daisy jumps through hoops to plan an extravagant proposal for Barrie and Scott; flirtations between Dani and Jean-Luc continue to build; plates fly during a lunch service.

Sydney goes all-in on Gary; Alli is pushed to her breaking point; a rowdy group of returning guests spells trouble; Dani and Jean-Luc get more intimate during the the night shift, and Sydney notices Jean-Luc's work is suffering as a result.

Natasha is frustrated with Daisy's constructive criticism; Gary and Colin play blackjack croupiers for the guests; Sydney gets frustrated as Gary puts the hot pursuit on Alli.

The deck team springs into action when a surge of wind pushes Parsifal towards the dock; Dani has a panic attack while under sail; Colin receives heartbreaking news from home; Alli feels the pressure to address Sydney’s dirty laundry.

The interior pulls off a murder mystery dinner; an anchor tangle threatens to hold up the guests’ departure; Gary and Alli openly express their affections; Jean-Luc and Gary argue about work; Dani and Alli take matters into their own hands.

The crew is excited to enjoy a much-need day off together, but things get touchy when the couples’ PDA goes on full display. Amidst the lovers vs non-lovers quarrel, Sydney drops bombs that re-ignite Daisy and Gary’s interior vs exterior feud. While at the dock, high winds blow Parsifal straight into the dock. Glenn and the deck team scramble to bring the boat to safety, and Gary comes to the rescue in a big way. Just as the crew thinks they have things under control they smash into the dock a second time!

Glenn reels in the aftermath of the boat crash. After assessing the damage, the crew does their best to get the boat - and their mindset - into charter-ready condition… but a high-maintenance group of female guests only sends the crew further into a spiral. A thunderstorm threatens the guests' first dinner, and Natasha only adds to the chaos when she suddenly decides to remove courses from the dinner menu, leaving the guests hungry for more. When Jean-Luc reveals to Dani that he may have given her an STD, things really get turbulent.

The cat fight continues as the guests gut each other over lunch. Later that night, Daisy pulls together a mermaid-themed dinner while Jean-Luc dons glittery leggings and serves himself up as dessert. Alli makes a difficult decision that leaves Gary reeling. Sydney is tasked with writing a song about women’s empowerment, and Colin offers to orchestrate. Things get awkward when the primary overhears Alli complaining about her mom and informs Glenn of the indiscretion. At a perilous beach picnic, the rosé runs dry, and as the Parsifal crew begins to crack, Glenn’s frustration boils over.

Tired of his crew making simple mistakes, Captain Glenn keeps an unwavering eye on them. A Women’s Empowerment Dinner takes a strange turn when the women involved can’t stop tearing each other down. Sydney and Colin bring the mood back up when they perform an original song for the guests. An evening sail catches Natasha off guard, and she never quite catches back up. Dani and JL get serious about where their relationship is heading but questions still linger. Gary takes a swing and whiffs on an attempt to get Alli back and then doubles down on more bad decisions.

An awkward jacuzzi party ends in a screaming match that Daisy tries but fails to mediate. Jean-Luc plans a romantic date for Dani. And when Captain Glenn announces that a last-minute charter is coming aboard, the Parsifal crew goes into a tailspin.

A charter group of super-yachties arrives, and the Parsifal crew is anxious about being judged by their peers. But as the guests get boozed up, the Parsifal crew contemplates getting down, and Captain Glenn keeps a worried eye on his party-hardy team. After the charter, the final night out takes place at a picturesque castle, where Daisy reveals a secret that sets fireworks off in all directions. Back on the boat, the crew forgoes fighting for festivities, as Gary turns the hot tub into a wet and wild bubble bash. Most of the crew says their good-byes, but Natasha, Gary, Alli, and Sydney stay aboard to help Glenn with an ocean crossing. The drama doesn’t stop even though the season is over.

Daisy confronts Gary about his behavior; Natasha and Daisy still can't agree on the amount of pitas served; Glenn answers uncomfortable questions about the biggest crash in "Below Deck" history; Andy asks Dani the question everyone wants to know.