The Nest

Stressed by marital breakdown and alcohol problems, Dr. Ben Cahill freezes up under pressure in the emergency room. He is forced into taking a break by his superior and decides to unwind for a few months in the house he and his ex bought on Orr island, a fishing community off the coast of Maine.

Here he starts examining, at the request of Sheriff Hobbs, some animal and human corpses with strange internal as well as external injuries.

The doctor observes that one of the red cockroaches which recently infested the island has pincers, which is most unusual. He reads up and contacts the university entomology department, where this African species is considered obscure. He finds that his house is also infested with these cockroaches.

Cahill is on the receiving end of local backlash and one man Jack, breaks into and attempts to trash his home but is killed by the cockroaches.

The sheriff allows Cahill to perform an autopsy upon Jack and he discovers that these cockroach-like insects burrow into people and nest inside them, liquidating the internal organs before bursting out of the host. At first, some of the townspeople begin to suspect that Cahill is responsible for the deaths of their friends, resulting in a mob attacking Cahill and locking him and his girlfriend Nell in jail. Meanwhile Sheriff Hobbs is attacked by Jack's brother Eamon when he attempts to stop them breaking into Cahill's home; he is locked in the basement and killed by the insects and his body is found after one local, Guy, attempts to free him.

When released from jail Cahill and Nell immediately begin to evacuate the locals, beginning with Nell's mother and the children in her school class although one pupil is missing. Cahill and Nell rescue him after finding his parents dead and discovering the cockroaches are nesting in a barn. They then flee back into town.

After they warn the reluctant locals of the danger, a swarm of the mutant insects is seen flying overhead. Now believing Cahill's story, they attempt to flee but many perish including Eamon and his goons. Cahill, Nell, Guy and Henry get in a boat and try to reach the mainland, and are again attacked, but they overturn the boat and set a fuel pump alight, incinerating the bugs just as the military is called in to deal with the problem. However, it is revealed that one of the bugs had made it to the mainland, ending the film ambiguously.