Year: 2023
Runtime: 106 min
Language: English
Director: Mel Eslyn
In the aftermath of Earth's destruction, two individuals find themselves as the last people alive. They must adapt to a desolate and barren world, struggling to redefine their purpose and build a strong connection to ensure the continuation of humankind. Facing immense loneliness and the challenges of survival, they must discover if they can truly thrive in this new reality.
Warning: spoilers below!
Haven’t seen Biosphere yet? This summary contains major spoilers. Bookmark the page, watch the movie, and come back for the full breakdown. If you're ready, scroll on and relive the story!
Read the complete plot breakdown of Biosphere (2023), including all key story events, major twists, and the ending explained in detail. Discover what really happened—and what it all means.
After a global apocalypse has decimated the human population, the only survivors are two childhood friends: Billy, the former President of the United States, and Ray, a scientist who was once Billy’s adviser. Carrying the weight of guilt for his perceived role in causing the apocalypse, Billy and Ray find solace in a protective dome constructed by Ray that shields them from the harsh realities of the outside world. They maintain a modest fishpond, but unease sets in when the last surviving female fish dies, leaving them with only two male fish, one of which is showing signs of distress.
One night, while working late, Ray stumbles upon a fascinating discovery: the remaining fish appear to be undergoing sequential hermaphroditism, a process that allows them to change sex to continue breeding. To his astonishment, he notices a vivid green light shining outside the dome. The following morning, Ray shares his findings with Billy, only for Billy to realize that he too is undergoing sequential hermaphroditism, which means his body is gradually developing female characteristics.
This revelation leaves Billy feeling distraught about the changes overtaking his body, while Ray becomes increasingly fascinated by the phenomenon. However, their dynamic shifts as Ray finds himself uncomfortable when he touches Billy, particularly when physical intimacy leads to unexpected feelings of arousal. As the fish begin to breed, Billy confides in Ray that he has started menstruating and suggests that they consider having a child together. Struggling with deep-seated homophobic beliefs instilled in him during his upbringing, Ray hesitates and pulls away from Billy, causing tension between the two.
Despite the emotional upheaval, their bond begins to strengthen when they decide to pursue intimacy with the aim of procreation. Their initial attempt is shrouded in modesty, with a sheet covering Billy, yet as the moment unfolds, Ray’s reservations dissolve, and they share a kiss. Soon after, Billy finds out he is pregnant, and this development brings them closer together.
Their newfound intimacy faces a significant challenge when a fierce storm hits, shattering the dome’s windows and forcing them to dismantle the fishpond in a desperate attempt to seal the breaches. The subsequent morning brings a surprising sense of awe as they witness the aurora borealis lighting up the sky, a sign that the weather may be shifting. However, the reality of their dwindling food supply compounds Ray’s distress as the death of their fish takes its toll. In a moment of encouragement, Billy recalls a story from Ray’s eighth birthday, urging Ray to cling to hope amidst their uncertain future.
Last Updated: November 07, 2024 at 23:44
Still wondering what the ending of Biosphere (2023) really means? Here’s a spoiler-heavy breakdown of the final scene, major twists, and the deeper themes that shape the film’s conclusion.
In the end, Biosphere reveals that even in the most surreal and seemingly hopeless circumstances, nature’s resilience and the human capacity for transformation remain powerful forces. Despite the bleakness of their apocalyptic world, Billy and Ray’s relationship evolves into something deeply meaningful, rooted in love, trust, and hope. The strange phenomena they witness—the green light and Billy’s unique pregnancy—serve as symbols of life’s unpredictable ability to find a way, reinforcing that change and magic are intrinsic to existence. As Billy embraces the possibility of magic—symbolized by the bowling ball he conjures and the miracle of their unborn child—the dome’s chaos mirrors their internal shifts, from despair to renewed faith. Ultimately, the movie suggests that hope and transformation are not only possible but essential, illustrating that life can flourish even in the most unlikely and absurd conditions. The final thud of the bowling ball echoes as a metaphor for Billy’s newfound hope, signaling that belief in the impossible can lead to new beginnings and the rebirth of optimism in a shattered world. Their story ends on a note of unlikely optimism, demonstrating that even in darkness, life finds a way.
Last Updated: June 25, 2025 at 08:44
Don't stop at just watching — explore Biosphere in full detail. From the complete plot summary and scene-by-scene timeline to character breakdowns, thematic analysis, and a deep dive into the ending — every page helps you truly understand what Biosphere is all about. Plus, discover what's next after the movie.
Track the full timeline of Biosphere with every major event arranged chronologically. Perfect for decoding non-linear storytelling, flashbacks, or parallel narratives with a clear scene-by-scene breakdown.
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