A teenage girl goes for a run through the woods while listening to music, unaware that a young man is following her. She stops to stretch and drink water but feels like she is being watched. When she turns around, no one is there. Upon turning back, she finds one of her necklaces on the ground, which confuses her as she thought it was lost. A flashback reveals that the young man stole the necklace from her bag in the school changing rooms. The girl puts the necklace in her pocket and continues her run deeper into the woods, with the young man beginning to close in on her.