Three years after her family is brutally murdered by her former teacher, who became obsessed with her, a young woman tries to move on with her life. She's now living with her aunt and uncle, trying to put the past behind her. The ordeal is brought back to the forefront of her mind as her high school prom approaches, a night that is supposed to be about celebration and new beginnings. Despite the horrific memories attached to her stalker, who was never apprehended, she decides to attend, hoping to finally enjoy a semblance of normal teenage life and put the traumatic past to rest.

On the night of the prom, the young woman and her friends arrive at the hotel where the event is being held, ready to leave their worries behind and have a memorable evening. Unbeknownst to them, her former teacher has escaped from prison and is on a relentless quest to find her, fueled by a deranged obsession. As the night progresses, what was meant to be a night of joy and celebration turns into a horrifying game of cat and mouse. She must now navigate the dual challenges of surviving the night and protecting her friends, all while confronting the traumas that have haunted her for years.