When the sun sets in the city of Manila, don’t you dare make a wrong turn. Otherwise, you'll end up in that dimly-lit side of the metro, where blood-sucking aswang run the most-wanted kidnapping rings; where gigantic kapre are the kingpins of crime; and magical engkantos slip through the cracks and steal your most precious possessions.

It's the end of the 21st century, and a strange plague called "Cagaster" has appeared. One-in-a-thousand people are infected—turning humans into monstrous cannibalistic insects. Two-thirds of humanity is decimated. 30 years later, young expert bug exterminator and mercenary, Kidou, and newfound friend, Ilie, struggle to survive in this brutal new world, all while delving into the mysteries of the plague and its origins.