A wealthy entrepreneur secretly creates a theme park featuring living dinosaurs drawn from prehistoric DNA. Before opening day, he invites a team of experts and his two eager grandchildren to experience the park and help calm anxious investors. However, the park is anything but amusing as the security systems go off-line and the dinosaurs escape.
Bill Dancer and his young companion Curly Sue are the classic homeless folks with hearts of gold. Their scams are aimed not at turning a profit, but at getting enough to eat. When they scam the rich and beautiful Grey Ellison into believing she backed her Mercedes into Bill, they're only hoping for a free meal. But Grey is touched, and over the objections of her snotty fiancé.
After a terrible air disaster, survivor Max Klein emerges a changed person. Unable to connect to his former life or to wife Laura, he feels godlike and invulnerable. When psychologist Bill Perlman is unable to help Max, he has Max meet another survivor, Carla Rodrigo, who is racked with grief and guilt since her baby died in the crash which she and Max survived.
A large spider from the jungles of South America is accidentally transported in a crate with a dead body to America where it mates with a local spider. Soon after, the residents of a small California town disappear as the result of spider bites from the deadly spider offspring. It's up to a couple of doctors with the help of an insect exterminator to annihilate these eight legged freaks.