Margo Dey, a college girl working in a morgue, spends her nights mopping marble floors and chatting with corpses. Her only living companion is George, the grief-stricken night watchman. The quiet is shattered when Peter and Nan Townsend, along with a frightened young girl, Jill, arrive seeking help. As Margo assists them, it becomes clear that something sinister wants them to stay. Panic erupts when Jacob and his wounded friend Samim burst in, seeking aid. The group of strangers must band together to escape the menacing shadow that looms ever closer.