A group of young scientists are working on a secret project that may allow them to travel ahead in time. They test it by sending one of their own ahead one hour. He returns pleading with them to shut it down, explaining that within that hour, they will all die.

It's been 5 years since the outbreak that wiped out 85% of the world's population, but the war between Re-Animates (Re-Ans) and Humans wages on. Most of the major cities are still uninhabitable. Within the few surviving cities, the Re-Ans have been segregated into "zones" and are policed by the R-Division of the QUASI S.W.A.T. Unit who hunt to re-kill the Re-Ans in the hope of quelling a second outbreak.

A rescue goes terribly wrong for a sheriff when trying to save four dirt bikers when they are trapped by growing forest fires. Desperate, they seek shelter in an abandoned mine, never realizing they are headed straight for evil from the sheriff's past.

A westerner named Casey, studying Ninjutsu in Japan, is asked by the Sensei to return to New York to protect the legendary Yoroi Bitsu, an armored chest that contains the weapons of the last Koga Ninja.

The school teacher Amy has been proposed by her boyfriend Nick early in the morning and she promises her answer later in the afternoon. After her class, while coming back home, Nick has a car accident in a crossroad with a truck driven by Lucas Dylan. He breaks his leg and an ambulance takes him to the hospital. Amy has a phobia about hospitals, but she gets a taxi and goes to the nearest hospital. However, Nick is not there, and she meets Lucas, who is also looking for his sister that has disappeared in the same weird circumstance. They decide to team up and search together where the victims might have been interned, while Amy experiences the most bizarre and scary situations.