A frightened woman named Alma is running down a small stream when an unseen assailant murders her. A bird watcher has his arm hacked off and murdered off screen. Four friends—Peter, Joanne, Ingrid and Craig—are trekking through nearby wilderness. Unbeknownst to them, another tourist is thrown over a waterfall (landing near some oblivious frolickers) and his mother is wounded, and dragged away. The four backpackers set up camp for the night. Elsewhere a pair of honeymooners named Dick and Cherry are attacked. Dick is murdered off screen when he exits the van to investigate a noise. Cherry, now paranoid, arms herself with a small bust. Dicks body is thrown against one of the windows and spits up blood on it. The killer rocks the van back and forth, sending it tumbling down a small hill where it catches on fire with Cherry still inside. The next day, the two couples continue their hike. Meanwhile, an artist painting a scenic view is stabbed to death, and her young daughter is kidnapped.