Operation D3

Natalie Thompson wakes up in a basement without any memory of how she got there. With her memories a blur, she feels alone in a seemingly abandoned and very strange town. Within this town, creatures who can get a glimpse of human life through a portal are no longer content with their undead status.
With the works of a government conspiracy and a few megalomaniac scientists, the portals are expanding. Now these creatures are threatening our civilization, and our world is on the brink of destruction. Can Natalie control the artificial intelligence chip and regain her memory in time before all of humanity is lost?