Dr. Daniel "Dan" Challis is a hardworking doctor struggling with the relationships between him and his ex-wife, as well as his children. On October 23, a man named Harry Grimbridge is brought into the hospital where Dan works, trembling with fear and clutching a jack-o'-lantern mask. Harry is killed that night by an unidentified man who then goes to his car and immolates himself. The next day, Dan is confronted in a bar by Harry's daughter, Ellie. He tells her about the strange events of the night before and shows her the mask her father was holding when he was admitted to the hospital.
