In the post-apocalyptic, zombie-infested wasteland, a glimmer of hope exists in the foothills of the Rocky Mountains: the fortress. For decades, the inhabitants have defended this last bastion of humanity against zombie hordes and built their society and culture based on military precision. Chosen from the best of the best, Denver Team Alpha was formed. DTA is the elite combat unit deployed for the rescue of refugees and survivors who have ventured into the hellish wasteland of Denver. However, due to the unimaginable risks and high mortality rate, DTA now stands for something else: Dead Team Alpha. Now, DTA must prove its skills, as something far worse than zombies lurks in the vast wasteland.