Gates Falls, Maine. When an abandoned textile mill is reopened, several employees meet mysterious deaths. The link between the killings: all occurred between 11 p.m. and 7 a.m.—the Graveyard Shift. The sadistic mill foreman has chosen a group to clean up the mill's rat-infested basement. But what the workers find is a subterranean maze of tunnels leading to the cemetery—and an unimaginable horror that comes alive in the dead of night.