From the announcement:
Something has awoken the Great Old Ones. An unstoppable incantation has begun, and the fate of the world lies in the hands of a few brave Investigators. However, time is short. An unspeakable horror is making its way to our world with each passing second. The only hope is to disrupt the ritual just enough so that when the ancient god from another dimension arrives, the Investigators will have a brief window when it’s vulnerable… and that’s when they shoot it in the face.