The group of friends found out that the mysterious girl they had found in the forest was called Eleven, and she had the number 011 tattooed on her arm. They nicknamed her “El” and tried to find out where she came from and what had happened to her. Meanwhile, scientists from the laboratory continued to investigate the area around the Byers’ house, where a boy named Will had disappeared. They found a strange substance on the wall of the shed that sparked more interest in the area.

El found a photo of Will in her new friend Mike’s house, and it became a vital discovery in the search for the missing boy. However, when Dustin and Lucas appeared in the house, El used her psychokinetic powers to prevent them from telling Mike’s parents anything and slammed the door shut.

When Hopper, the town sheriff, began his search for Will, he found a piece of fabric on the overgrown area near the laboratory. It turned out to be a stained hospital shirt belonging to El, which provided a lead in the search for Will.

Will’s brother Jonathan went into the forest to search for his brother, and when he found the spot where the bike was found, he heard screams and saw that Nancy, her friend Barb, and a couple of guys were hanging out by the pool at Steve’s house. Jonathan decided to take some pictures, including a photo of Barb just moments before her disappearance.

At that time, Will’s mother, Joyce, received another phone call from her missing son. Additionally, the sound of a tape from Will’s room came through the phone line, and when she approached the wall, she saw a strange creature emerging from it, which frightened her even more.