Cabin Fever

Five college friends — Paul, Karen, Jeff, Marcy, and Bert — rent a remote cabin in the woods to celebrate graduation. The locals are immediately hostile and strange. On the first night, a hermit stumbles onto their porch, clearly infected with something — flesh-eaten, bleeding, begging for help. In a panic, Bert sets him on fire. He crawls away into the woods.

The group tries to forget it happened. Then Karen gets sick. The virus — a flesh-eating infection spread through contaminated blood and water — moves fast, and the reservoir feeding the cabin is already compromised. Karen is quarantined in the shed while the others argue. Paul tries to get help from the locals and gets beaten. The sheriff is useless. The group falls apart.

The infection spreads. Marcy sleeps with Paul in a fatalistic, nothing-to-lose moment, then goes to shave her legs and discovers the skin coming off with the hair. She walks outside and is killed by a dog. Jeff, the most self-preserving of the group, has been hiding in the woods since Karen got sick; he finds a bag of weed and largely opts out of proceedings. Bert gets sick. Paul finds the hermit's body decomposing in the reservoir — the source of everything.

Paul puts Karen out of her misery and makes a last attempt to escape. He reaches a diner visibly ill. The locals shoot him — they've known about the contaminated water supply and have been quietly covering it up. The sheriff finishes what the locals started.

In the epilogue, the contaminated water has been bottled and shipped for commercial distribution. The last shot is of the bottles moving down a production line, going everywhere.