11 to 6 (1970)

Sinopsis

Jennifer, a young waitress, finds herself alone at the end of her closing shift at a quiet diner. As she prepares to lock up for the night, she becomes the target of a brutal slasher who has been stalking her every move. With no one else around and no way to call for help, Jennifer is trapped and left to defend herself against the relentless attacker. As the night wears on, the killer's presence becomes more and more oppressive, forcing Jennifer to fight for her life in a desperate struggle to survive until the morning light.