I'm the warp master!
The episode begins with the Gems on Mask Island. Pearl and Garnet are on the island's beach and discuss a Gem Monster missing from the island. As Steven admires the ocean view, Amethyst tells Steven it's time to go. Before going, Steven asks if he could warp them home which Pearl jovially allows. Steven is then shown to be able to safely warp all of the Gems back to the house (calling himself the "Warp Master"). Amethyst pranks Steven by turning her head into a fly's head, making it seem that Steven's warp skills are what caused it. When Pearl mentions they have to warp out again, Steven asks if he can warp the team again, but Pearl tells him no, as they will be underwater and Steven needs air to breathe. To compensate for his lack of adventure, Steven goes and tells Lars and Sadie that he's the warp master.
At the Big Donut, Steven bursts in and calls himself the warp master only to see Sadie and Lars are slouching at the counter with the latter asleep. As Sadie tries to get Steven a doughnut, she knocks over Lars and wakes him up, throwing the two into an intense argument. Watching them, Steven once again says he's the warp master and explains that he can warp the three of them to an island for vacation. While reluctant at first, Sadie says it could be worth a try, making Lars come along. Once there, it's revealed he had taken them to Mask Island. Confused and angry, Lars asks Steven why the Gems were there in the first place, and Steven explains that they were looking for a dangerous monster Gem. Bursting with anger, Lars stubbornly marches off to the Warp Pad, only to find it missing. Seeming to be stranded, the trio spends the night on the island.
The next day, Sadie tries to hunt for fish on the island while Lars tries to find a signal on his phone. Asking Lars to help (who refuses as he looks for a signal), Sadie gets frustrated with Lars and stabs the water with her hunting stick, and catches three fish. Angrily, Sadie tells Lars that while they're on the island, she'll hunt for fish, and Lars will cook it. Later that day, Lars cooks the hunted fish and is complimented by Sadie on his cooking skills. Cracking a joke about fire, Lars is able to get a laugh out of Sadie. Seeing progress in the friends' relationship, Steven sings the song, "Be Wherever You Are". As the song plays, a transition of several days and key events pass, such as Lars using his pant leg to wrap Sadie's bitten arm. As the three sleep, Lars and Sadie cuddle.
The next morning, Sadie wakes up alone and asks Steven where Lars had gone. Shrugging, Steven points outside to Lars panicking and still searching for a signal. As Sadie tries to calm him, Lars ends up throwing his phone into the ocean. Crying, Lars admits that he's very homesick. As Sadie reassures that she's there for him, she tries to fist bump him, only to see that he's stroking her hand. Sadie, as Lars asks her if she gets lonely, even when people are around, sadly watches him and nods. Lars then kisses Sadie on the lips. Sadie then reacts by kissing him back. Steven, who was secretly watching them from afar, suddenly starts singing the conclusion to the song.
The two yell at Steven, as they were having a moment and Steven rudely interrupted them. Before scolding him further, the three are confronted by a floating gem and get knocked off the side of a hill. Steven then deduces that the gem is the monster they were looking for never really left, it was just invisible the entire time. As the three run away, Lars starts to sob and desperately exclaims that he wants to go home. Sadie, watching with a look of guilt, leads the three through the forest to a large lump covered in leaves. Uncovering it, it is revealed to be the Warp Pad, as Sadie had hidden it in a panic knowing that Lars needed the vacation. Blaming her for everything that happened, Lars starts to yell at Sadie, going as far as to say that she forced herself onto him. Shoving him in anger, Sadie accidentally pushes Lars off a cliff where the monster is hiding.
Terrified, Lars is thrown around by the beast until Sadie comes down and knocks the beast over. Fighting it, Sadie is able to tackle and aggressively shove the beast around, and eventually destroy it as Steven had thrown Sadie's hunting stick to her, telling her to use her "fish-murdering skills" to destroy the monster, which she does. Obviously hurt, Sadie gets up and uses the stick to walk to the Warp Pad. As Steven compliments Sadie's awesome fight, Lars awkwardly compliments her too, to which she replies that it's not an action to read into. Before they warp away, Steven tells them that they should do this again sometime.
- Lars Barriga
- Sadie Miller
- Mask Island Fish
- Moonstone (antagonist)
- Mask Island Worms
- Based on the day to night transitions, Steven and company spent around ten days on the island, which would make it the longest known time that Steven had spent away from the Gems.
- A sneak peek of this episode was shown at New York Comic-Con.
- This is one of the most heavily censored episodes in foreign countries.
- The title might be a reference to the "Adventure Island" series or even the Islands of Adventure theme park at Universal Studios Florida.
- Amethyst made a reference to the 1958 horror film The Fly when she morphs her head into a fly after being transported on the Warp Pad by Steven.
- Moonstone and Lars' statement to burn the island are likely references to the novel Lord of the Flies, as the plot of the story is children becoming stranded on an isolated island, eventually developing a paranoia of an imaginary beast residing on the island. Eventually, the boys' actions (due to the paranoia and other events) cause them to burn down most of the island at the end of the book.
- The fight between Moonstone and Sadie may also be a reference to the 1987 horror film Predator where the main character fights an invisible foe utilizing mud as camouflage, primitive weapons, and hand-to-hand combat.
- When Steven wears a grass skirt, this combined with his short stature and his black hair make him somewhat resemble Master Higgins from the Adventure Island video games, whose title contains the same words as "Island Adventure". But unlike Steven, Master Higgins also wears a cap and no shirt.
- The episode name is also used in Cartoon Network's other cartoon Teen Titans Go!.
- It is possible that this episode is continuing where Lars and Sadie's friendship left off at the end of the episode, "Joking Victim".
- It is revealed in "Marble Madness" that the name of the island is "Mask Island".
- It is revealed that since Steven is half-human, he stills needs air to breathe, unlike the Crystal Gems.
- During the fight with Moonstone, Sadie receives a scar on her face, leaving a permanent mark visible in every episode following "Island Adventure".
- At 1:02, when Steven is approaching Pearl, the star in Garnet's uniform is colored black.
- Steven goes from having no underwear under his leaf skirt to having underwear, to having tattered jeans, to having no underwear again.
- During the Song "Be Wherever You Are", Steven's ukulele goes through his left shoulder but in the next scene, there is a change of position.
- At the end of the episode, Steven doesn't have his ukulele.
View the episode's transcript here.