Elias, a high school junior, faces relentless bullying, particularly from his neighbor, Agnes. As he grows more isolated from his divorced father, Stefan, his younger brother, Jonas, and his best friend, Adam, he finds comfort in the online game The Secret World. There, he connects with the avatar Sc4rlet, who becomes a source of support. However, when a humiliating video of Elias is posted online, he spirals into despair, contemplating suicide.
One night, Sc4rlet sends Elias a photo and invites him to meet at the central station of their hometown, Stockholm. Unfortunately, after his phone is stolen and destroyed by Agnes, he cannot find her. Later, Elias spots Sc4rlet on the train home but hesitates to approach her. Instead, he steps off the train onto the tracks, only to be saved by Sc4rlet—who had suspected he might be in danger. Their friendship develops from this moment of vulnerability.
As their relationship deepens, Sc4rlet encourages Elias to confront his bullies. They devise a plan to take revenge on Agnes, the bully who has tormented him, by humiliating her in a similar manner. Elias and Sc4rlet plan to strip Agnes and distribute photos online, and later, they plot to steal drugs from a local hospital, intending for Elias to use them to bolster his confidence.
During an outdoor gymnastics class, Elias makes his move against Agnes, but she fights back, ultimately injecting him with the drugs. Under the influence of the substance, Elias has hallucinations where Sc4rlet guides him to the roof of a neighboring building, suggesting a dark fate—"we will die together, like you want to." Meanwhile, Stefan discovers evidence of his son's struggles when he finds the drugs and a video recording of the bullying incident in Elias's room, with Adam delivering the shocking footage to him. Stefan rushes to rescue Elias from the roof just in time.
After waking up in the hospital, Elias faces his father's anger for not revealing the bullying or his drug use. When Stefan asks how he can help, Elias requests something that only deepens the family’s pain. Once discharged, he records a heartfelt video suicide note, saying farewell to his friends and family. That evening, Sc4rlet appears in his room, revealing that she is a figment of his imagination—a comforting presence in his darkest times. The next morning, Elias boards a ferry to Åland, where Sc4rlet reappears, questioning his intentions before he sets up a camera to record and jumps off the ferry into the sea.
Three days later, Stefan hears news of his son's disappearance, feared to be a suicide. At school, a memorial is held, where students mourn Elias. Adam interrupts the principal's speech by playing Elias's suicide note, shocking everyone as he exposes Agnes and her friends. The truth of the bullying comes to light through an unedited video of the earlier incident. Just as the audience grapples with the disturbing revelations, Elias makes a surprising appearance in the gallery, alive and safe. A flashback reveals that he survived the fall by jumping onto a lower deck, with his father catching him. They orchestrated a faked death to shed light on the bullying epidemic.
Eventually, as a united family, Stefan, Elias, and Jonas watch a television interview where Stefan addresses the ethics of Elias's actions. He boldly states, "Bullying is never taken seriously, not until someone dies. We needed someone to die, so that the world could see the truth." In a poignant moment, Sc4rlet reappears in Elias's vision, beaming at him as he finally finds happiness again. Determined to connect with her, Elias uses the number she had texted him earlier in the story. Through this, he discovers her real name is Scarlet Friedmann, and they meet once again, both thrilled by the long-awaited connection that had initially eluded them.
