CABIN FEVER

In the woods, a hermit named Henry discovers his dog has died from a mysterious illness and is sprayed by its blood. Five young friends, Paul, Karen, Bert, Jeff and Marcy have rented a cabin in the same woods for a week-long vacation. The group stops for supplies at a General Store, where Dennis, the mentally impaired son of the store manager, unexpectedly bites Paul's hand.

As Bert ventures into the woods to shoot squirrels, he accidentally shoots Henry. Upon realizing Henry is infected with a disease, he panics and flees, keeping quiet about the incident.

Later that evening, while the group hang out around a campfire, a stranger who calls himself Grim and his Belgian Malinois dog, Dr. Mambo, gatecrash their evening.

Later that night, Henry stumbles into the cabin in search of help. Bert slams the door in his face and the desperate man tries to steal the group's vehicle. A conflict ensues, during which the five friends accidentally cripple their car and set Henry on fire. The infected man runs off into the woods.

The next day, Jeff and Bert head out in search of help. They encounter a farmer who offers to help them, but hastily leave when they discover that Henry is her cousin. Meanwhile, Deputy Winston arrives at the cabin to investigate reports of the previous night's commotion. Paul explains things without mentioning Henry's presumed death. Winston promises to send a tow truck before departing.

Dr. Mambo returns to the cabin without Grim and seemingly infected. He threatens Paul and Bert, before Marcy scares him off with the rifle.

While Paul and Karen make out, they discover that Karen is infected with the flesh-eating disease and her leg has started to decay. Fearful of contagion, the others lock her in the shed. Paul leaves on foot to find help, but the only people he encounters chase him away, mistaking him for a peeping Tom.

The following morning, the group's attempt to evacuate is botched when Karen vomits blood all over the car's interior. While Bert drives to the general store alone, Jeff abandons everybody and flees to a remote shack. Marcy and Paul lament their poor chances of surviving and have sex, believing they won't live long enough to regret it. They later discover marks on Marcy's back that reveals she, too, is sick.

At the general store, Dennis bites Bert's hand just as he did with Paul. His father, Tommy, lashes out at Bert for exposing his son to the virus, and he and his friends chase Bert down in order to contain the disease. While searching for help, Paul encounters the severely-burnt but still alive Henry in the lake. Henry attacks Paul, who fends him off and finally kills him.

Marcy draws a bath and shaves her legs, causing the infected flesh to gruesomely peel from her body. She stumbles outside in distress and is mauled to death by Dr. Mambo.

Paul returns to the boat shed where Karen begs him to kill her. His gun is empty and since he's unable to finish the job of splitting her face with a shovel, Paul sets the shed on fire and watches in horror as Karen is burned alive. Bert makes it back to the cabin, but he is followed and shot dead by Tommy. Paul recovers Bert's rifle and guns down Tommy and his two accomplices. Paul escapes in Tommy's truck, but crashes it into a tree and explodes. Covered in blood, Paul stumbles upon a small campfire party attended by Deputy Winston. Winston receives a radio call from the sheriff ordering her to shoot Paul on sight. However, Paul convinces Winston to let him go instead.

The next morning, Jeff returns to the cabin. He finds the corpses of his friends and Tommy's accomplices, and rejoices in having survived the ordeal himself, until he sees signs of the infection on his hand. He is then shot and killed by Deputy Winston with a sniper rifle. Paul succumbs to infection and drops dead in the woods where Dennis discovers his corpse. Back at the cabin, as the authorities and a hazmat crew clean up the scene, it's revealed that Jeff's corpse landed near the lake, which is now infected with his blood.

The group’s struggle ends in bloody catastrophe as the virus consumes both bodies and trust, with most of the friends succumbing to infection or violence. The authorities arrive, but the infection’s spread remains ominously unresolved.

Cabin Fever closes on a nihilistic note, showing that isolation and mistrust can be as lethal as any virus. The friends’ attempts to survive are undone by panic, poor decisions, and the relentless nature of the infection. The authorities’ belated intervention suggests the cycle of horror may continue, leaving viewers with an uneasy sense that the threat remains at large.