Synopsis:

A crew of night workers, including college-educated drifter, John Hall (David Andrews) and Castle Rock tomboy Jane Wisconsky (Kelly Wolf) is hired by The Bachman Mill to clean out the basement of a long-abandoned textile factory over the Fourth of July weekend.  They are supervised by bullying foreman Warwick (Stephen Macht).  When the efforts of exterminator, Tucker Cleveland (Brad Dourif)  to rid the basement of a horde of rats are unsuccessful, the crew is ordered to assist.  While in the mill's sub-basement tunnels, the clean up crew discovers the deadly rats are led by a giant mutant bat-rat monster.