It's the day after Christmas in suburban Florida, and Billy 5000 and his friends are trying to pass the seemingly endless days. They spend their time slacking, shoplifting, and beatboxing, lounging on the beach, and sneaking into pools. Billy is also hustling on the food-on-demand app Grubster, desperately trying to earn $5,000 before New Year's Eve.
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Read the complete plot breakdown of Boys Go to Jupiter (2025), including all key story events, major twists, and the ending explained in detail. Discover what really happened—and what it all means.
Suburban teenager Billy 5000 lives in Florida. He sometimes hangs out with his kid brother, Peanut, and his friends, Freckles and Beatbox, at the beach. One day during Christmas break, they spot a strange sluglike creature.
This break, though, Billy has quit school to get a job with Grubster delivering food. He’s found a glitch in the app’s programming that greatly inflates his earnings. So he hopes to earn a total of $5000 to then move out of his older sister Gail’s home. In the course of his job, he encounters eccentric restaurant owners and customers, including one who never leaves their hotel room.
One delivery leads him to the Dolphin Groves Juice Factory, where he meets a former friend, Rosario Dolphin. She’s the daughter of company president Dr. Dolphin, and the company’s heir. But Rosario, now going by “Rozebud”, has no interest in working at all. She callously shows the factory’s secret research lab to Billy, who impulsively steals an experimental fruit from it. Billy’s friends warn him of stories that Dr. Dolphin is actually a genius dolphin mutated by NASA experiments. Billy also discovers that a strange disk shaped creature from the lab has stowed away in his backpack. He names it Doughnut, but is reluctant to keep it.
Grubster catches the programming glitch, and Billy loses nearly all his earnings. Around the same time, Dr. Dolphin calls him, telling him she knows about his theft from the lab. But she wants him to bring Doughnut back more. Dr. Dolphin explains that Doughnut is one of a set of creatures that have the power to select the best specimens of fruit. They were key in Dr. Dolphin’s ability to build Dolphin Groves from a fruit stand to a major corporation. She offers to pay Billy $5000 in return for Doughnut.
Billy brings Doughnut to Dolphin Groves, but at the last minute he has a change of heart and he runs away with Doughnut. Then he and Doughnut are suddenly teleported to the swamp. There they encounter the creature from the beach, who reveals her name as Glarba. Glarba is an alien who’s been the mysterious customer hiding in her hotel room the whole time. She has been hosting an intergalactic food blog where she’s been reviewing all the food Billy has brought to her, although she tends to find the packaging tastier. Doughnut and the other creatures turn out to be her children. Because Billy took care of Doughnut, she proposes starting a family with him and her children. Back at Dolphin Groves, Dr. Dolphin has to face her own mother over her failure to retrieve Doughnut. It turns out it’s her mother that’s the mutant genius dolphin from NASA. Dr. Dolphin’s mother orders her to step aside for Rozebud to take over.
Billy goes missing. It’s later reveal that he accepted Glarba’s proposal. So he now lives with Glarba and her children as a family, in a cave deep underground. Some time after New Year’s Day, Peanut starts sending food down to Billy’s family via a secret pipe.
Last Updated: September 20, 2025 at 11:19
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