Private investigator Matthew Scudder is hired by a drug kingpin to find out who kidnapped and murdered his wife.

Pressured by his deceased mother's ghost to return home to the family he abandoned, a former addict grabs a bag of pills and a sack of marijuana and hits the road to Louisiana.

A group of high-schoolers invite Mandy Lane, an innocent, desirable girl, to a weekend party on a secluded ranch. While the festivities rage on, the number of revelers begins to drop mysteriously.

Six years after Earth has suffered an alien invasion, a cynical journalist agrees to escort a shaken American tourist through an infected zone in Mexico to the safety of the U.S. border.

Beautiful Mandy Lane isn't a party girl but, when classmate Chloe invites the Texas high school student to a bash in the countryside, she reluctantly accepts. After hitching a ride with a vaguely scary older man, the teens arrive at their destination. Partying ensues, and Mandy's close pal, Emmet, keeps a watchful eye on the young males making a play for Mandy. Then two of the students are murdered.

In the desert area of Hat Creek, cows are found partially devoured and the farmers believe that a wolf is attacking the cattle. The alcoholic Sheriff Annie Flynn is called by the local farmer Rob Horn to witness the remains of an animal to request reimbursement from the government and for an accident with a tank truck that is blocking the road. However, Annie sooner discovers that an ancient alien creature sent to annihilate life on Earth hundreds of years ago was released by the Indian Kale during an archaeological excavation in the desert. The Indian Caya and a group of travelers stranded in the spot without gas together with Annie and Kale try to find a means to destroy the alien and save mankind.