Diumbra (die-uhm-brah) is a secret society hidden beneath the depths of Los Angeles. Daphne, lives a normal life to the outside world, but among the shadows, she and Diumbra divide and conquer, monsters you can't even imagine. Only the creatures in your worst nightmares. But one day the monsters' powers strengthen, and they escape the undergrounds of Los Angeles. They are now scampering through the city. Diumbra can't stop them alone, they need human technology, human strength and knowledge. Is Daphne willing to give up her and her teams life long secret or keep it, and watch the whole city suffer as monsters take over...