The episode begins with Maddie leaping into her body just as the ambulance is about to leave. Suddenly, the school halls are flooded with a crimson hue, signaling the entrance into the ghost world. In the real world, Nicole and Claire rush back inside the school to search for Simon, but all they find are his torn earphones.
Meanwhile, Wally hesitates at the threshold of the white light but ultimately decides not to cross it. In Martin's scar, Janet confronts him, demanding to know why Simon is trapped with him. She grabs Simon, and his hand is cut by a shattered test tube. They quickly realize that Simon is alive but stuck in the afterlife. Excited by the prospect of unraveling the mystery, Janet decides to help Simon.
Wally is stunned to stumble upon Simon in the school halls. At the hospital, Xavier shares with Maddie about speaking to her father's ghost. However, Sheriff Baxter interrupts him before he can reveal more. Sandra enters the room after they leave to check on Maddie, followed by a nurse who administers antibiotic pills for her head wound.
In the hospital corridors, a man overhears Baxter and Xavier discussing Maddie's ghost-seeing abilities. As for the ghosts at school, they conduct a headcount and find everyone accounted for. Simon blames Wally for delaying Maddie's return and causing the afterlife mix-up. Janet steps in to defend Wally and mentions Martin's hint about a greater evil at the school.
Xavier, Nicole, and Claire discuss returning to the school to find Simon. On the other hand, Rhonda volunteers to help Simon while the others debate their original hypothesis. Janet believes that the collective trauma of their energy might generate enough power to lift the invisible boundary keeping them tethered to the school. She now believes that this power opened a new passageway.
Upon hearing this, Simon endeavors to test the border theory, with the fervent hope that it will lead him back to his physical form. However, his attempts only result in an intensification of his agony, as he is, technically, alive. He attempts to persuade Janet to allow him to see Martin, but she declines, fearing that Martin's desperation could put them all in danger.
In the meantime, Maddie is discharged from the hospital. Sandra wonders why Simon hasn't visited her yet. On their way out of the hospital, Maddie asks if her father died there. Back at school, the ghosts decide to conduct an experiment later that night to help Simon by exploring their scars.
As they wait, Simon languishes alone in a classroom. Later, Sheriff Baxter offers to drive Maddie and Sandra home. Maddie insists that he stop the car and runs into the school. It turns out that, like Simon, she can't see the other ghosts unless they are in a room where someone died before. She finally sees Wally but is unable to hug him. Finally, she sees the other ghosts, and they try to tell her about Simon. She rushes off to see him without listening to them first. Unfortunately, Simon breaks the sad news of being stuck in the afterlife.
Before she can process this information, Sandra arrives and drags her away. At home, Maddie insists that she has changed her mind and wants to return to school starting the next day.
At school, Yuri reassures Charley that nothing has changed, even after seeing his scar. They finally define their relationship as well. Later, they try out Janet's experiment, but nothing happens.
The next morning, Simon shared the plan with Maddie, promising to be close by her side. However, the atmosphere around her changed drastically, with everyone, especially the mean girls, giving her a cold shoulder. During the assembly, Dr. Hunter-price, the district superintendent, announced that the school would be closing in the near future due to recent events that necessitated stricter disciplinary actions to maintain order. This announcement further fueled the blame directed towards Maddie and her friends, making her the new target of Livia, the school's notorious mean-girl leader.
The principal checked in on Maddie, and she lied about having memory loss from her head wound. She met with Simon in the greenhouse to catch up. Simon asked Maddie to retrieve his suspension letter from the office before it reached his parents and also asked for his tablet from his car so they could text his parents. Wally interrupted them and asked to talk. Maddie admitted feeling overwhelmed and suggested meeting at the football field after school.
Simon met with Janet, who was convinced that refusing to take her exit door caused the imbalance. She was determined to leave to give Simon a chance to escape. In the world of the living, Xavier and Nicole successfully retrieved Simon's suspension letter. Wally and Maddie met at the football field, where they admitted wanting to continue their relationship despite being unable to physically touch each other. Wally's charming self managed to make her laugh, and before leaving, Janet visited Martin in his scar. He was her key, so she needed him to let her in. Reluctantly, he agreed, allowing Janet to take her exit door. Everyone in the ghost world felt Janet's departure.
Rhonda met Simon in the boiler room, where he explained what had happened and gave her the goodbye letter Janet left for them. The group read the letter together and processed Janet's departure, with Yuri eventually keeping it in his pocket. It turned out that Janet had left a message for him in the greenhouse, but Yuri was too afraid to use his key to visit it, so he decided not to go.
At home, Maddie talked to her mom about her dad and realized that Sandra was lying about her drinking habits. However, she didn't confront her. At Nicole's place, they found out that someone had posted a video of Maddie talking to herself on the football field.
The individual behind the mischievous troll account is revealed to be Livia, Hunter-Price's daughter. In the hospital, Xavier unexpectedly encounters Kyle, another ghostly presence. At school, Simon pays a visit to Martin, seeking information on a possible escape route. Martin pleads with Simon to let him out, but Simon refuses. Martin then drops a cryptic hint about something sinister that awaits them both.
Martin attempts to bypass Simon, but the latter pushes him back, causing him to fall. As he falls, it begins to snow in the scar on Martin's face, a look of sheer terror etched across his features.
Meanwhile, Maddie awakens and walks across the hallway in her house. She discovers a door and, upon opening it, finds herself in the school's boiler room.
Here's the revised and more expressive version in English:
The person behind the troll account is Livia, Hunter-Price's daughter. In the hospital, Xavier unexpectedly runs into Kyle, another ghostly figure. At school, Simon visits Martin to inquire if he knows a way out. Martin begs Simon to let him out, but Simon refuses. Martin then hints about something dark that awaits them.
Martin tries to get past Simon, but the latter pushes him back, causing him to fall. As he falls, it starts to snow in Martin's scar, and the look on his face is one of pure terror. Meanwhile, Maddie wakes up and walks across the hall in her house. She discovers a door and, upon opening it, finds herself in the school's boiler room.
