Captain Jason Chambers introduces a world of underwater adventure to charter guests along the world-famous Great Barrier Reef in Australia; while first-time bosun Jamie faces some initial challenges, new chief stew Aesha clashes with an ornery chef.
Aesha and Ryan's opposing views on service are tested during an explosive lunch; Brittini stands up for herself on deck, while Benny takes issue working in the anchor locker; Captain Jason introduces a most improved award that isn't well received.
Benny struggles to stay motivated on deck, while Jamie tries to keep his team in line; Ryan and Aesha's galley communication comes to a head when the guests aren't ready for service; the crew comes together to throw a vow renewal ceremony.
The crew gets in hot water with Captain Jason; Magda struggles in the laundry; a pirate-themed party challenges Culver to earn his title of "Entertainment Officer," but when guests ask him to jump in the hot tub, Tumi is shocked by what she sees.
The crew unravels as demanding charter guests push them to their limits; Jamie and Tumi disagree over Culver's actions; in an attempt to keep Captain Jason happy, Jamie tries to take control of his deck team.
Magda surprises the guests by putting on a show; Aesha learns that being a barista isn't easy; Ryan struggles to accommodate the guests' demands; an extra tip leaves Brittini in tears.
Aesha gives Magda a second chance at service; safety issues come to a head between Captain Jason and Jamie, but when Jamie doesn't agree with the captain's orders, he tries to get the deck team on his side.
The Thalassa crew hosts a prom night for the charter guests after their first adventure to the Great Barrier Reef; Ryan feels left out from the crew's activities; Magda has a hard time pulling her weight.
Magda oversteps her boundaries with Aesha; Captain Jason's colleague charters Motor Yacht Thalassa for a bachelor party; Ryan resists the guests' food requests and must face the consequences with Captain Jason.
The crew enjoys a day off on an Australian crocodile safari; Captain Jason finds shocking unfinished business left on the boat; Tumi comes to Aesha's defense when Ryan and Magda talk behind her back, leaving Aesha distraught.
Jamie puts Brittini on the night shift after Benny doesn't pull his weight; Aesha confronts Magda and Ryan for talking behind her back; Jamie is at his wit's end with Benny's behavior and wants him fired.
Jason's investigation of the deck team presents him with a difficult decision; Magda finds herself in hot water when she gets caught on the phone again; charter guests request a holiday party that calls for Culver and Aesha to dress up.
Jamie gets upset with his fellow crew members for name-calling; Captain Jason wants the boat to keep improving, but when the crew members fail to take his demands seriously, they find out the hard way that he means business.
With Thalassa in turmoil, Captain Jason tries to find his footing with his new team; Aesha struggles to keep the interior on the same page; when dinner service goes awry, Jason questions his decisions.
The new crew finally finds its footing, while Captain Jason starts to notice Jamie is having a hard time managing Culver; Culver gets too close to a charter guest on a night out and Brittini picks up the pieces.
Aesha finds her experienced new stew may have some learning to do in laundry; Captain Jason continues to notice Culver’s lack of initiative; Brittini calls out a double standard when she notices Jamie and Culver flirting with charter guests.
The Thalassa crew throws a vow renewal ceremony for the charter guests; Culver breaks Captain’s one big rule; on the final night out, everything comes to a head before saying their final goodbyes.
A new charter season gets underway in Cairns, Australia's gateway to the Great Barrier Reef; the interior and exterior departments start man-down as the crew scrambles to cater to party-hearty guests.
The charter guests continue to be on edge with each other; a new stew comes aboard, giving the interior relief while captivating the deck team; a crew member over-commits to the Cancana surprise kiss threatens to ruin the party.
A complicated love triangle threatens to make things awkward on deck; the CEO is back for another round of fun; the guests have an icy request; a deck crew member overlooks his duties resulting in one of the guests gets a cutting surprise.
Heavy wind and rain threaten to drown a difficult beach picnic; a stew takes liberties with her break time; the guests experience a dinner fit for a god; on a night out, romantic entanglements get knotty when a surprising new hookup happens.
A love pentagon takes shape as crew romances heat up in multiple directions; a personality conflict on the interior intensifies; one of the deckhands falls behind, and a dinner service for the guests goes awry when their preferences are overlooked.
Chef Tzarina struggles to rebound after a dinner gone wrong; a stew tries to convince Aesha to switch shifts, and the crew pulls off a touching memorial celebration for the guests.
The crew reels and bands together in the wake of a serious event, Capt. Jason handles not one but two difficult matters between crew members; when a person on the deck team is forced to leave the boat, the hierarchy on the exterior gets a shakeup.
The deck team gets a surprising new leader, which causes resentment to grow within the department; the interior struggles being one stew down; the chef and the chief stew get a blast from the past.
The deck team tries to recover after a mishap with the captain; a new stew joins the crew and instantly makes waves; the chef turns one of the guests into a work of art; during a night out, a hookup ignites jealousy.
After a surprising hookup, the chef ices people out; a family comes aboard and enjoys a meal in a remote location; the tender nearly capsizes as the crew races to free it from a disappearing island; a mistake on deck causes the boat to hit the dock.
The deck team reels after a docking debacle; the Chief Stew gets a surprise visit on a day off; a deckhand unhappily gets friend-zoned; a forbidden relationship becomes too tempting to ignore; a disastrous mistake endangers the boat.
A deckhand's fate is up in the air after an egregious error; the 2nd Officer tries to escape a rocky romantic past; the Captain reluctantly bares all for a budgie breakfast.
Captain Jason makes an unpopular decision to fire a deckhand; a Lead Deckhand joins the boat; Margot struggles with a challenge on her first attempt at service; a charter guest experiences a medical emergency.
The crew deals with a medical emergency onboard; Capt. Jason faces a tough decision when a crew member gets caught drinking on the job; a deckhand wants to take his relationship to the next level.
A relationship onboard explores new depths while another one finally breaches the surface; chaos ensues when charter guests become entangled in each other's dietary preferences; single charter guests give the deckhands a run for their money.
The guests get upset with Aesha when their bucket list Great Barrier Reef diving excursion gets denied; a familiar character returns to coach the deck team through a strip show for the guests.
The crew erupts in an argument when a deckhand meddles in the stew's drama; a date goes awry when Chef Tzarina reveals her true feelings.
Captain Jason gets involved when Chef Tzarina refuses to fulfill a guest request; Luka feels like a stew might be interested in him; the final night of the charter season leads to arguing, crying and relationships in shambles.
