After a sudden underwater tremor sets free scores of the prehistoric man-eating fish, an unlikely group of strangers must band together to stop themselves from becoming fish food for the area's new razor-toothed residents.
A new species of South American killer spider hitches a lift to a California town in a coffin and starts to breed, leaving a trail of deaths that puzzle and terrify young Dr. Ross Jennings, who is newly arrived in town with his family.