Blood Lake

Blood Lake is a 2006 pornographic horror film written by Erin Gilmer, and directed by C.L. Gregory. A sequel, with the tentative title of The Foundation Blood Lake 2, was announced in 2005.

The first of the group to be killed is Roger, who Preacher Jacob axes in the back. The preacher then captures Nicole, ties her to a tree, and hacks her to death with the axe. Next, Sam is garroted with a rope, and Nell has her throat slit in the shower. Tricia realizes what is going on, and tries to get help from Andy and Charlotte, but the two are kept sealed in their cabin by a supernatural force until Tricia is scared off by Preacher Jacob, who Andy and Charlotte spot, and conclude is connected to the blood book. Andy and Charlotte decide to barricade themselves in the cabin until sunrise, and pass the time by having sex.Later, Charlotte goes to wake Andy up, but finds Preacher Jacob in his bed. The preacher kills her, and goes after the wounded Andy who has the blood book and Tricia. Preacher Jacob chases Andy and Tricia to a dock, strangles Andy, and is seemingly destroyed when Tricia sets the blood book on fire. Tricia gets in one of the cars and drives away, but as she leaves the campgrounds, Preacher Jacob appears in the vehicle, and attacks her. ........

Source: Wikipedia