A relaxing day turns out to be a nightmare and a new discovery. Zombies are showing up and no one knows where they are coming from. Jennifer puts the puzzles pieces together and soon finds out that there is a tunnel below. After receiving a map with blueprints she discovers that the tunnel was built in 1863 by the runaway slaves. The problem with that is that it ran from the tip of Oregon to the Black Mountains in Henderson, Nevada. The story turns chilling as Jennifer and her team must stop the zombies and to find the entrances that they are using. What will it be for Jennifer and her team as the ending turns into a surprise.