Blood Hook is a 1986 American slasher film directed by Jim Mallon and starring Mark Jacobs, Lisa Todd, Patrick Danz, Sara Hauser, and Christopher Whiting.

It follows a group of young people who arrive in a small northern Wisconsin town during a fishing festival, where a series of bizarre disappearances and murders are occurring.

While at his family's lakeside lodge in northern Wisconsin, six-year-old Peter van Cleese witnesses his grandfather mysteriously become overtaken by an apparent supernatural force while fishing on the dock.

At the lodge, the group are met by Wayne Duerst, a neighbor hired by the Van Cleese's to look after the property since Peter's grandfather's death.

While Peter and his friends visit local restaurant that evening, middle-aged tourist Sheila Swain is attacked on a nearby dock by an assailant who entangles her with a large fishing line, and pulls her into the lake.

That night, while the locals hold a contest for who has caught the largest muskie, fisherman Denny Dobkins is stranded on the lake when his boat motor malfunctions.

He sounds an emergency horn for help, but is gored by a large fishing hook cast at his abdomen, and pulled into the lake.

The music, combined with the incessant chirping of cicadas, drives Leudke mad in his nearby bait shop—the sound penetrates through a metal plate in his head, which he had implanted after suffering a brain injury in the Korean War.

A panicked, exhausted Kiersten finally returns to the lodge, and tells Peter how she was attacked with a large fish hook, and managed to elude it by swimming to the other end of the lake, where she became lost in the woods.

Evelyn suggests that the metal plate in Leudke's head could amplify these sounds, which would become overpowering, a phenomenon he witnessed amongst his fellow veterans.

The next morning at the fishing festival, when Leudke wins the contest, Wayne publicly accuses him of being the murderer, but the sheriff doesn't believe him.