Hideous, slimy monsters with razor-sharp tentacles and teeth are released from a coal mine in Utah. They make their way to a cozy cabin where four young friends - Trish, Jessica, Mark and Roger -...

Hideous, slimy monsters with razor-sharp tentacles and teeth are released from a coal mine in Utah. They make their way to a cozy cabin where four young friends - Trish, Jessica, Mark and Roger - have just settled in. The vicious creatures go on a gruesome rampage, slicing and slashing people and dragging them into the dark basement.