Otherworldly creatures inhabit the bootleg tunnels underneath a small town mining community, and they kill any of the townsfolk who invade their home.

Scotty moves into Mrs. Engels’ seaside mansion where three other college students are boarding. Mrs. Engels prefers to stay in her room in the attic, but her son Mason helps the students get settled. Soon one of the students is killed. The policemen on the case begin uncovering the Engels family secret as the remaining students become endangered