From the Cherry Picked Games site:
Secret societies control the fate of humanity. A select few know magic, demons, and unlimited power exist. Some strive to bring forth these demons; others exist to protect our species. "Shadow Parliament" follows the players' induction into the Shadows and their clandestine efforts to prevent the cataclysm.
This guide aids game masters in directing a Catalyst campaign. "Shadow Parliament" takes 3-5 players through a longer, 7-session campaign.