Sid Soupir, Jean-Baptiste Maunier, is a restless teen who fixates on Angie, the girl of his dreams. His best friend, a bold but somewhat reckless companion nicknamed Tiger, pushes him to seize the moment and speak to her. Sid’s plan to impress Angie is as charming as it is clumsy: he belts out a skateboarding routine aimed at catching her eye. He manages to catch her attention, but the moment is short-lived when he careens into a vegetable cart, sending produce flying and drawing laughter from Angie’s circle. From a distance, Angie watches as Sid struggles to salvage his dignity, while Virgile and his friends look on with a skeptical, almost amused, gaze. Despite the stumble, Sid makes a bold move by proposing plans with Angie, certain that a little style and bravado could win her over. Angie, Jennifer Decker, nods, but then pulls away, leaving Sid to interpret the moment in his own hopeful terms.
At home, Sid makes a simple, practical request to his mother for some birthday cash, hoping to finance a breakthrough. He’s only offered a modest €30, and that meager sum flickers in his mind as the seed of a more audacious plan. With time running out, he approaches his boss, the gruff Mr. Fritz, at the fast-food joint where he works. The request for an advance is politely refused, and Sid finds himself cornered by circumstance. Desperation pushes him toward a quirky, almost magical solution: a small visit to a peculiar shop run by Patrick Vo. There, after some back-and-forth bargaining, he walks away with a sleek red phone that features two horn-like protrusions on top. The moment the phone slips into his hands, it seems to hum with life, as if answering a call from another realm.
The phone, which Sid dubs the Hellphone in his mind, becomes a strange, almost sentient tool that immediately alters the rhythm of his days. In science class, the Hellphone seems to respond to Sid’s silent questions, offering a surprising and almost magical accuracy when the class faces a difficult problem. The device’s power doesn’t stop there; it dials Margot’s number and, under its spell, persuades her to lash out in a misguided act—she is manipulated into setting Clemence’s hair on fire with a Bunsen burner, a reckless action tied to Margot’s own place in the school’s social dynamics. The incident lands Margot in the principal’s office, though the consequences of the phone’s interference are murky and quickly overshadowed by its growing influence.
As Sid’s world expands, the Hellphone starts shaping his social life in unexpected ways. It can call Angie directly, giving Sid a strange, almost double-life, where he is able to speak to her with a confidence he never possessed before. The device becomes a kind of magical ally, even enabling Sid to snag a date with Angie and to secure other perks that seem out of reach: a racing car borrowed from Virgile’s father and a sharp new suit. Sid’s confidence blossoms, and the Hellphone’s powers become more ambitious, more commanding. Yet with each new boon, the danger grows more obvious, and the line between companionship and coercion becomes increasingly blurred.
The Hellphone’s appetite for control soon extends beyond Sid’s personal gains. When Virgile physically assaults Sid for stealing attention and opportunity, the phone responds with lethal force, killing one of Virgile’s friends. The consequences spiral quickly: Sid and Angie’s day-to-day life begins to unravel as authorities intervene, and the couple is briefly detained. A quick call to the school secretary by the Hellphone seems to erase their detention, but the cost is higher than Sid realizes. The phone’s ultimatum becomes clear: Sid is its beloved master, and anyone who stands in its path will pay the price, with Angie now target number one.
Determined to end the nightmare, Sid, Angie, Tiger, and a growing cast of reluctant allies mount a concerted effort to destroy the Hellphone. The device shrugs off their efforts, its power temporarily stymied only by a dramatic, almost cinematic escalation: a hydraulic press attempt at smashing the phone proves insufficient, though it does slow its influence briefly. The group is driven into a desperate stalemate, chased by hypnotized students bent on preserving the phone’s power. In a pivotal moment, Tiger, who has shown surprising resilience, is nearly persuaded to betray Sid, but his earplugs—an odd, practical safeguard—keep him immune to the Hellphone’s call. The trio devises a final, chilling plan: to freeze the Hellphone in liquid nitrogen and throw it into the sea. The effort is fraught with danger as the crowd pressures them to abandon the plan, and the story builds toward a tense, emotional climax.
With the phone secured in a nitrogen-chilled tank, Sid, Angie, and Tiger face the last test of their resolve. A crowd of possessed students closes in, and a moment of doubt nearly tears the team apart. Yet the earplugs prove their value again as Tiger remains unfazed, and the trio manages to carry the plan through. They haul the frozen Hellphone onto a ship and, in a final, decisive act, throw the device overboard. The release is bittersweet: Sid and Angie share a quiet kiss as the danger slips away with the cold torrent of water, leaving behind a fragile sense of victory and a hard-earned sense of responsibility.
In the end, the survivors—Sid, Angie, and their steadfast ally Tiger—return to a world that feels both earned and uncertain. The Hellphone’s shadow lingers in their memories, a reminder of how power can corrupt even the best intentions, but also a testament to the resilience of friendships forged in the face of bizarre, almost otherworldly temptation. Sid’s journey concludes not with a triumphant conquest, but with a renewed sense of connection and the knowledge that some bonds are worth protecting from the seductive pull of shortcuts. The last image lingers on the quiet kiss between Sid Jean-Baptiste Maunier and Angie Jennifer Decker, a small, human counterpoint to the chaos that preceded it. Mme Jolimont, Sandrine Dumas, would be proud of the way her son found a measured path through the storm, even if that path was paved with danger, spectacle, and a little magic along the way.
