chunk: Tina Gray, a teenager, walks through a boiler room dressed in a nightgown. She is stalked and attacked by a disfigured man wearing a blade-fixed glove. She awakens from the nightmare, but her mother points out four mysterious slashes in her gown.
  The following morning, Tina is consoled by her friend Nancy and her boyfriend, Glen. Later, Nancy and Glen sleepover with Tina following her mother's out-of-town departure. The sleepover is interrupted by Tina's boyfriend Rod, who tries to have sex to reconcile after arguing. Falling asleep, she sees the man and runs. Awakened by Tina's thrashing, Rod witnesses her being fatally slashed by an unseen force. He flees as Nancy and Glen find Tina, mistakenly blaming Rod. Nancy tells her father, Lieutenant Don Thompson, of Tina's death.