When their originally planned outing is cancelled, four friends go on a hunting trip in Texas. They include Craig, a straitlaced man; Jerry, a mysterious relative of Craig's from New York; Tom, a nerd; and Lance, a hedonist. When they arrive, they discover that a chupacabra has bitten their guide Clyde, and, unknown to all, he has begun to slowly turn into a zombie. As Clyde shows the friends their cabin, Lance and Candy, Clyde's daughter, make out in the next room. Clyde warns them not to cross onto the property of Billy Ray, a local gangster, and, discovering Lance and Candy, angrily leaves with his daughter. Later that night, Craig reveals that he intends to marry his girlfriend, and Lance behaves strangely; Jerry tells Craig that Lance and Craig's girlfriend have been having an affair, but Craig refuses to believe it.