Justin Russo eagerly anticipates a special encounter with London Tipton after winning an essay contest that awards him a "teen cruise" to Hawaii aboard the SS Tipton. His siblings, Max Russo and Alex Russo, share in his excitement, but their parents, Theresa Russo and Jerry Russo, put their foot down, refusing to let Alex join the cruise due to her struggles in school. However, Alex discovers that a school is available on the ship and convinces her parents to let her go on the condition that she attends classes. Although she agrees, Alex devises a plan using magic to bring her friend Harper Finkle onto the ship to attend classes in her place. There, Harper crosses paths with Cody Martin.
Meanwhile, Alex meets Bailey Pickett and uses dubious means to help her win a tug-of-war game. When Mr. Moseby demands to know her identity, Alex cleverly claims her name is Ashley Olsen to avoid trouble. In a series of amusing events, when Justin finally meets London, he pretends to be a doctor, initially sparking her interest. However, he quickly loses his attraction upon realizing her lack of intelligence. Simultaneously, Max engages with Zack Martin, Cody's twin brother, as they compete in a slushie-drinking contest that escalates into a racing challenge with luggage carts. An unexpected disaster occurs when Max collides his cart with bystanders near the hot tub, causing Bailey to topple in while eating pizza.
Upon witnessing the chaos, London begs Justin to save Bailey, but he hesitates, admitting he doesn’t know how to help. Alex steps in, expertly performing abdominal thrusts to rescue Bailey. Mr. Moseby, having observed her heroic act, commends Alex for her bravery but gets confused when he loses track of her assumed identity — having mistaken her name for Ashley Simpson instead of Ashley Olsen. This confusion escalates when Max and Harper call out Alex's real name, leaving Mr. Moseby baffled. After this, Max decides to retaliate against Alex's trickery by pushing her into the hot tub. Disheartened by Justin’s lack of action, London storms off, calling him “a dumb doctor” and breaking up with him, which Justin agrees to. In a magical twist, Alex later transports Harper back home, but realizes she might have sent her to Rome inadvertently and continues her trend of skipping class.
Meanwhile, Hannah Montana, also known as Miley Stewart, and her best friend Lola Luftnagle board the SS Tipton en route to a concert in Hawaii. Cody hopes to secure tickets to the concert for Bailey, a huge Hannah fan, but struggles to obtain them directly from Hannah, who fails to recognize him. After a few unsuccessful attempts, he learns about a scavenger hunt opportunity, prompting him to enlist the assistance of Woody Fink. Back on the cruise, Justin, Alex, and Max continue their antics, with Max trying to impress London while Alex begins to catch Zack's eye. In a moment of rivalry, Alex mischievously dyes the hot tub water blue, leading to further chaos as Mr. Moseby mistakes Zack for the instigator and confines him to his cabin.
As their adventures unfold, Cody's endeavors to secure concert tickets face setbacks—ultimately leading him to a cake mishap that jogs Hannah's memory of him, allowing them to finally connect. The emotional rollercoaster peaks when Hannah loses a cherished anklet, prompting a series of unfortunate events leading her to nearly cancel her concert. However, encouragement from her father, Robby Stewart, reminds her of her mother's spirit living within her, reigniting her confidence. With the concert back on, Cody and Bailey receive last-minute invitations to the after-party, solidifying their burgeoning romance. Before the Russo children conclude their cruise adventure, London shares a heartfelt moment with Max, she coyly promises they will meet again, sealing it with a kiss on his cheek.
This episode uniquely integrates characters from all three shows involved in the crossover, reminiscent of past interactions in the That's So Suite Life of Hannah Montana event. However, it's noteworthy that Selena Gomez, David Henrie, and Jake T. Austin do not share scenes with either Miley Cyrus or Emily Osment in this installment. The episode also marks a significant development in the relationship between Cody and Bailey, who finally share mutual feelings for one another after Cody's long-standing affection since their first meeting.
